1. PRODUCT OVERVIEW

[IMAGE-JF — LD1-G Gold Edition — product overview photo with remote]

 

The LoadTRONIK LD1-G Gold Edition is Revtronik's top-of-the-line wireless trailer simulator, designed to charge, test, and analyze both the electrical circuits and pneumatic brake systems of Class 6–8 commercial vehicles — without requiring a physical trailer. Whether you are performing a scheduled PMI inspection, diagnosing an intermittent wiring fault, or completing a CVSA pre-trip check, the LD1-G gives a single technician everything they need, instantly, in the palm of their hand.

 

The Gold Edition is the only model in the LoadTRONIK lineup equipped with a full wireless remote control, allowing complete operation from anywhere around the truck or trailer. It supports in-series bidirectional operation between the tractor and trailer simultaneously, and it is the only edition capable of remotely controlling the pneumatic brake system while connected in series.

 

The LD1-G shares the same proven wireless platform as Revtronik's popular TestTRONIK series — devices that have sold thousands of units across North America. Technicians who use these tools simply cannot work without them.

 

Learn more about the full LoadTRONIK lineup: revtronik.com/loadtronik

 

LOADTRONIK EDITION COMPARISON

Feature	LD1-G Gold	LD1-S Silver	LD1-B Bronze
Electrical load simulation (~8A)	Yes	Yes	Yes
Dual pneumatic gauges (Emergency + Service)	Yes	Yes	Yes
Full-colour LCD display	Yes	Yes	No
Simultaneous voltage + current reading	Yes	Yes	No
Wireless remote control	Yes	No	No
Remote pneumatic brake control	Yes	No	No
In-series bidirectional operation	Yes	Yes	No
7-pin round receptacle (SAE J560)	Yes	Yes	Yes
7-pin flat receptacle (domestic trailer)	Yes	Yes	Yes
4/5-pin round adaptor compatible	Yes	Yes	Yes

 

2. CONTROL PANEL & INDICATOR REFERENCE

[IMAGE-JF — LD1-G control panel — front face with buttons and LED indicators labelled]

 

2.1 BUTTON & DISPLAY FUNCTIONS

Button	Function	Description	Status Indicator
Button 1	Blue wire overload toggle / Screen Up	Activates or deactivates the electrical overload on the blue wire circuit. Also scrolls UP through the LCD screen menu.	No Load light ON = blue wire isolated from overload (display power only). No Load light OFF = blue wire included in overload.
Button 2	Enable current overload / Screen Down	Activates the ~8A current overload on all active circuits. Also scrolls DOWN through the LCD screen menu.	Overload active = current load applied to all circuits.
Button 3 (Enter/Menu)	Enter menu / Confirm selection	Enters the LCD configuration menu and confirms selections. Used to navigate language, backlight, sync settings, and firmware updates.	N/A — see LCD screen
LCD Display	Voltage / Current readout	Full-colour screen showing real-time voltage or current per circuit, depending on selected display mode. Also displays dot indicators for voltage quality.	Active when any circuit is energized or external power is connected.

 

2.2 LED INDICATORS — 7-PIN ROUND RECEPTACLE (SAE J560 — HEAVY TRAILER)

[IMAGE-JF — 7-pin round receptacle SAE J560 — LED indicator diagram]

 

LED	Circuit	Description	Light On = ?
1	Signal Light	Clearance / marker light signal	Voltage present when circuit activated
2	Positioning Light	Tail / running / positioning light signal	Voltage present when circuit activated
3	Auxiliary / ABS	Auxiliary circuit or ABS module signal	Voltage present when circuit activated
4	Left Turn Signal	Left turn indicator	Voltage present when circuit activated
5	Right Turn Signal	Right turn indicator	Voltage present when circuit activated
6	Brake Light	Stop lamp / brake light signal	Voltage present when circuit activated

 

2.3 LED INDICATORS — 7-PIN FLAT CONNECTOR (DOMESTIC TRAILER — OPTIONAL ADAPTOR)

[IMAGE-JF — 7-pin flat connector receptacle — LED indicator diagram]

 

LED	Circuit	Description	Light On = ?
1	Signal Light	Clearance / marker light signal	Voltage present when circuit activated
2	12-Volt Power	12V auxiliary / battery power circuit	Voltage present when circuit activated
3	Reversing Light	Reverse / backup light signal	Voltage present when circuit activated
4	Left Turn + Brake	Left turn signal and brake light (combined)	Voltage present when circuit activated
5	Right Turn + Brake	Right turn signal and brake light (combined)	Voltage present when circuit activated
6	Electric Brake System	Electric brake controller signal	Voltage present when circuit activated

 

3. ELECTRICAL SPECIFICATIONS

Parameter	Value
Current reading precision	0.01 Amp
Maximum current per circuit	20 Amps
Voltage reading precision	0.01 Volt
Maximum voltage per circuit	18 Volts
Simulated load current	~8 Amps per activation
Maximum continuous overload duration	10 minutes (thermal cutoff)
Operating voltage range	9–16V DC (12V nominal)
Dot indicator — Green	11–14V (normal range)
Dot indicator — Yellow	Below 11V (low voltage)
Dot indicator — White	Non-constant / pulsed signal (turn signals)
Pneumatic gauge — Emergency (red)	Dedicated dial — brake disengagement pressure
Pneumatic gauge — Service (blue)	Dedicated dial — service brake application pressure
Standards reference	SAE J560, FMCSS Part 393, CVSA blue wire standard

 

4. OPERATING

[IMAGE-JF — LD1-G in use — connected to tractor 7-pin receptacle in service bay]

 

The LoadTRONIK LD1-G allows you to simulate a current load on your vehicle's electrical wiring even when no trailer is available. The average simulated current load is approximately 8 amps. With the LD1-G, you can simultaneously see the current draw and voltage of each activated circuit, identify which circuits are live, and detect whether any wires are contacting each other — all via the LED indicators and the full-colour LCD screen on the unit.

 

In the pneumatic version, the integrated dual-dial gauges allow you to read the actual air pressure being sent by the vehicle. You have one dedicated dial for the Emergency circuit (brake disengagement) and one for the Service circuit (brake application). For even greater precision, the wireless remote control screen provides a live digital pressure readout directly in your hand.

 

The LD1-G Gold Edition is the most capable device in the LoadTRONIK lineup. It can be used standalone on the vehicle, or in series between the vehicle and a connected trailer. External voltage source connection is also possible via optional adapters, allowing the display to remain powered independently of the vehicle's electrical system.

 

The Gold Edition's wireless remote control lets you perform all of the above functions remotely — see the voltage, current, and air pressure data directly in your hand, apply the electrical load, and control the pneumatic brake system remotely — all without a second technician.

 

5. TURNING ON THE SCREEN

To activate the LD1-G, simply energize any electrical circuit on your vehicle. The screen will light up automatically and display the current or voltage, depending on the mode you have selected. There is no dedicated power button — the display wakes the moment a circuit is live.

 

Alternatively, the optional external power wires allow you to connect the LD1-G to a vehicle battery, an external shop battery, or an automotive accessory socket to power the display only. When using external power, that wire is used exclusively to power the display — no current overload will be applied to it, and its voltage is fully isolated from the vehicle diagnostic circuit.

 

5.1 VIA 7-PIN ROUND RECEPTACLE (SAE J560 — HEAVY TRUCK)

[IMAGE-JF — 7-pin round SAE J560 plug connected to tractor receptacle]

 

Turn the ignition key to the ON position or start the engine. You should immediately see voltage on the blue wire (constant auxiliary power), which will light up the blue wire LED and activate the LCD screen. This is standard practice for all Class 6–8 heavy trucks.

 

If no voltage appears on the blue wire when the ignition is on, your vehicle may be using a manual switch on the blue wire. This configuration is technically non-compliant with the industry standard for constant auxiliary power, but it is common. In that case, simply turn on the switch and the screen will light up.

 

5.2 VIA 7-PIN FLAT CONNECTOR OR 4/5-PIN ROUND TOW ADAPTORS (STANDARD VEHICLES)

[IMAGE-JF — 7-pin flat connector and optional 4/5-pin round tow adaptor]

 

The LD1-G has been designed primarily to the electrical standards of heavy vehicles and adapted for standard vehicles. For standard vehicles using a 7-pin flat connector or optional round tow adaptors, if no voltage appears on the blue wire when the ignition is switched on, power the display from the parking lights (brown wire).

 

Note that when powered via the parking light circuit, the current overload will be divided between the brown wire and any additional circuits you activate. Keep this in mind when interpreting current readings during overload testing.

 

5.3 VIA EXTERNAL POWER SUPPLY (OPTIONAL)

[IMAGE-JF — External 12V battery connection to LD1-G optional power input]

 

Connect the optional external power wires to a 12V vehicle battery, portable jump pack, or automotive accessory socket. The display will activate independently of any vehicle circuit. This method is strongly recommended when operating in pneumatic series mode, as it protects the technician if vehicle electrical connections become unstable during testing.

 

6. ACTIVATING THE CURRENT OVERLOAD

[IMAGE-JF — LD1-G overload activation — Button 1 and Button 2 highlighted on unit]

 

6.1 BLUE WIRE ISOLATION (NO-LOAD MODE)

By default, when the LD1-G activates, the No Load light below Button 1 is illuminated. In this state, the blue wire is used solely to power the display — its voltage is not subjected to the current overload. This is intentional: the blue wire is the CVSA constant auxiliary power circuit, and isolating it from the load ensures you can monitor its voltage quality without creating an artificial load on it.

 

To include the blue wire in the overload test, press Button 1 to turn off the No Load light. The blue wire will now receive the same ~8A overload as all other active circuits when you press Button 2.

 

6.2 ENABLING THE CURRENT OVERLOAD

Press Button 2 to activate the current overload. The simulated load of approximately 8 amps will be applied to all currently active circuits simultaneously. Observe the following on the LCD screen:

 

• Voltage per circuit — a healthy circuit should hold between 11 and 14 volts under load (green dot)
• Current draw — should reflect a realistic trailer load of approximately 8 amps
• LED indicators — confirm all expected circuits are energized

 

If the voltage drops significantly under load (yellow dot, below 11V), investigate:

 

• Corroded or loose connector pins at the 7-pin plug
• Undersized or damaged wiring in the vehicle's trailer harness
• Poor chassis ground connections at the frame or junction block
• High resistance at splices or connections near brake chambers

 

6.3 MAXIMUM ACTIVATION TIME — 10-MINUTE THERMAL PROTECTION

To protect both the user and the internal components of the LD1-G, the device limits continuous overload operation to a maximum of 10 consecutive minutes. When this threshold is reached:

 

• The power light begins flashing
• The unit automatically disables the overload
• Normal display operation continues unaffected

 

WARNING:  Prolonged operation beyond 10 minutes could cause internal components to overheat and, in extreme cases, create a fire hazard if the unit is placed on or near flammable material. Never defeat or bypass the thermal protection.

 

To re-enable the overload after automatic cutoff: turn off the activated circuit, wait briefly for the unit to cool, then re-energize the circuit and press Button 2 again.

 

7. USING THE PNEUMATIC GAUGE

[IMAGE-JF — LD1-G pneumatic gauges — red Emergency dial and blue Service dial with gladhands connected]

 

IMPORTANT SAFETY:  It is essential to install wheel chocks under the tires before performing any pneumatic check. Never conduct air system testing on an unsecured vehicle.

 

Connect the vehicle's red air gladhand to the LD1-G's red gladhand inlet, and the vehicle's blue air gladhand to the blue gladhand inlet. Once connected, the integrated pneumatic dials will immediately display the actual air pressure being delivered by the vehicle's air system.

 

The red dial (Emergency circuit) shows the pressure used to disengage the spring brakes. The blue dial (Service circuit) shows the pressure applied to the service brakes when the foot valve is activated.

 

7.1 PRESSURE DISCREPANCY DIAGNOSIS

The purpose of the LD1-G pneumatic gauges is to confirm that the pressure shown on the vehicle's dashboard gauges actually matches the real pressure being delivered to the trailer gladhand connections. Discrepancies reveal hidden problems such as:

 

• Manual brake deactivation valves that are partially closed
• Foot valve restrictions that limit pressure delivery under the trailer
• Damaged or kinked air lines between the tractor frame and the gladhands
• Governor or protection valve malfunctions reducing delivered pressure

 

7.2 AIR LEAK TEST — FMCSS PART 393 REFERENCE THRESHOLDS

The LD1-G can be used as a trailer substitute to perform a complete air leak test on the tractor's pneumatic system. Build the system to governor cut-out pressure (~120–125 PSI), apply the parking brake, shut down the engine, and monitor pressure drop over one minute:

 

Pressure Loss (PSI/min)	Classification	Required Action
3 PSI/min or less	Normal — acceptable	Vehicle is road-ready. Document and continue inspection.
4–6 PSI/min	Minor leak — monitor	Schedule repair. Vehicle may continue operating pending repair.
More than 6 PSI/min	Major leak — out of service	Vehicle must not return to road until leak is repaired. FMCSS Part 393 violation.

 

8. ADDITIONAL LCD SCREEN DIAGNOSTICS

[IMAGE-JF — LD1-G LCD screen — live voltage and current readout with coloured dot indicators]

 

The LD1-G full-colour LCD screen displays real-time voltage on each active circuit, as well as the total current consumed by all active circuits simultaneously. This level of detail is not available on the Bronze Edition, which has no colour screen.

 

One particularly useful capability of the LCD screen is voltage leak detection. A vehicle may have a small voltage leakage on a circuit — too low to illuminate the LED indicators, but clearly visible on the screen. This allows you to detect cross-talk between wires, parasitic draw from trailer accessories, or backfeed through corroded grounds, before they cause real-world problems.

 

8.1 DOT COLOUR SYSTEM — VOLTAGE QUALITY INDICATORS

Dot Colour	Voltage Condition	Meaning
Green	11–14V (normal)	Circuit is healthy. Voltage under load is within acceptable limits for commercial trailer wiring.
Yellow	Below 11V (low)	Voltage has dropped below threshold under load. Investigate connectors, grounds, and wiring. Indicates excessive resistance in the circuit.
White	Non-constant / pulsed	Represents turn signals or other switching circuits. Displays the lowest and highest average voltage across the on/off cycle. Not a fault condition.

 

9. USING THE LD1-G IN SERIES — ELECTRICAL

[IMAGE-JF — LD1-G in series — tractor > LD1-G > trailer wiring diagram]

 

The LD1-G Gold Edition allows you to connect your vehicle to the LoadTRONIK and then connect the LoadTRONIK to the trailer simultaneously. The goal is to see, in real time, the voltage being delivered to the trailer and the current consumption of the trailer — quickly and without any intrusive wiring work.

 

There is no need to open wire conduits, strip wires, build bypass harnesses, or use a multimeter with test leads. Simply plug the LD1-G in series between the tractor and trailer, and every circuit is visible on the screen immediately.

 

9.1 ISOLATING TRACTOR VS. TRAILER FAULTS

The series connection is the most definitive method for determining whether an electrical problem originates in the tractor or the trailer:

 

• Test the tractor alone first — connect the LD1-G only (no trailer). Apply the overload. If readings are normal, the tractor wiring is good.
• Connect the trailer — if a fault reappears (blown fuse, voltage collapse, tripped breaker), the fault is in the trailer.
• Key insight: if the trailer has a specific problem such as a short circuit, it will not show up on the LD1-G with the overload method alone. It will only appear when the actual trailer is reconnected — which is the clearest possible confirmation that the fault is in the trailer, not the tractor.

 

You can also combine the electrical overload with the trailer's natural current draw to stress-test the vehicle's connections under maximum realistic load. This reveals marginal connections that would otherwise pass a standard voltage test.

 

10. USING THE LD1-G IN SERIES — PNEUMATIC

[IMAGE-JF — LD1-G pneumatic series — tractor > LD1-G > trailer gladhand connection diagram]

 

IMPORTANT SAFETY:  It is essential to install wheel chocks under the tires before performing any pneumatic series check. Brakes may be engaged or released during this procedure.

 

With the LD1-G Gold Edition, you can use the device in series between the vehicle and the trailer — both electrically and pneumatically — simultaneously. This means you can not only read the air pressure being sent to the trailer in real time, but you can also control it remotely via the wireless remote control.

 

Simply connect the tractor's gladhands to the vehicle-side ports of the LD1-G, and connect the LD1-G's trailer-side ports to the trailer's gladhands. With the wireless remote control in hand, you can now:

 

• Remotely activate the emergency brake disengagement (spring brake release)
• Remotely activate the service brake engagement (brake application)
• Read the live air pressure on the remote control screen from anywhere around the trailer

 

This means one technician can go under the trailer to observe and measure brake chamber stroke, slack adjuster movement, and brake lining contact — while simultaneously controlling the brake application remotely. No second technician needed in the cab.

 

All results — air pressure, brake status, electrical readings — are visible live on the wireless remote control screen in the palm of your hand.

 

11. WIRELESS REMOTE CONTROL

[IMAGE-JF — LD1-G wireless remote control — front view with screen and buttons labelled]

 

The LoadTRONIK LD1-G uses the same wireless technology as Revtronik's popular TestTRONIK series of remote-controlled trailer diagnostic devices — a platform that has sold thousands of units across North America. Technicians who adopt these tools consistently report that they cannot imagine working without them.

 

The wireless remote control gives technicians complete operational flexibility. They can perform the entire diagnostic sequence independently — no assistant required — and see all results directly in their hand.

 

11.1 REMOTE CONTROL FUNCTIONS

From the remote control, you can activate the following functions remotely:

 

• Additional current load on the blue wire (Load AUX)
• Current load on all active wires (LOAD)
• Emergency brake system valve activation (pneumatic series mode)
• Service brake system valve activation (pneumatic series mode)
• Full control of all LD1-G functions

 

The remote control screen displays live voltage, current, and air pressure data — the same information shown on the LD1-G unit itself — directly in your hand from anywhere around the vehicle.

 

11.2 WIRELESS SYNCHRONIZATION PROCEDURE

[IMAGE-JF — LD1-G sync procedure — remote and device screens showing synchronization menu]

 

The new full-colour screens provide richer menu navigation than previous generations. All configuration, including synchronization, now passes through the menu system. No more button combinations.

 

Remote control — steps:

1. Press the Menu button on the remote control.
2. On the first screen, select LoadTRONIK Configuration, then press Menu to confirm.
3. Select Remote Synchronization.

 

LD1-G device — steps:

1. Press the Menu button on the LD1-G unit.
2. On the first screen, select Configuration, then press Menu to confirm.
3. Select Synchronization.
4. The screen will display the channel selection and enter synchronization mode.
5. Wait until the screen confirms Synchronization Done — the remote and unit are now paired.

 

11.3 MENU OPTIONS

From the Menu button, you can customize a wide range of settings including:

 

• Screen backlight intensity
• Display language
• Remote control name / identification
• Firmware updates
• Channel configuration

 

If you have a specific need not covered in the menu, contact Revtronik directly: revtronik.com/contact

 

12. WARRANTY

[IMAGE-JF — Revtronik warranty banner graphic]

 

The LoadTRONIK LD1-G is covered by the Manufacturer's Warranty for twelve (12) months from the date of purchase, as evidenced by the original invoice, against any defect in materials or workmanship under normal use conditions.

 

12.1 EXTERNAL COMPONENTS — 90-DAY COVERAGE

External components of the device are warranted for ninety (90) days from the date of purchase. These components are subject to regular handling and may be inadvertently damaged through normal use. External components include:

 

• Electrical cables
• Pneumatic hoses
• Air gladhands (plastic bodies and air connections)
• Electrical wires and connectors
• Pressure indicators / analog gauges
• Pressure regulator

 

12.2 WARRANTY TERMS & EXCLUSIONS

Parts found to be defective during the warranty period will be replaced or repaired at the manufacturer's sole discretion. The manufacturer reserves the right to replace the entire device. This warranty does not cover:

 

• Breakdowns caused by accidents or damage during transportation
• Damage resulting from improper handling, misuse, or operation outside specified parameters
• Repairs or modifications performed by unauthorized persons
• Damage caused by welding operations while the device is electrically connected (see Section 13)

 

This limited warranty supersedes and is in lieu of all other warranties, express or implied, including warranties of merchantability or fitness for a particular purpose. The manufacturer cannot be held liable for indirect damages, regardless of the cause.

 

For warranty claims or product support, contact Revtronik: revtronik.com/contact

 

13. SAFETY WARNINGS

[IMAGE-JF — Safety warning graphic — welding and electrical hazard icons]

 

13.1 WELDING OPERATIONS

WARNING — WELDING:  Never use the LD1-G when welding work is being performed on the trailer or tractor. Electrical cables must be fully disconnected from the vehicle before any welding begins. Welding current can create a ground loop through the device's internal electronics, permanently damaging the unit. Pneumatic gladhands may remain connected.

 

13.2 ELECTRICAL FAILURE DURING PNEUMATIC TESTING

WARNING — PNEUMATIC SERIES:  On pneumatic models, it is VERY IMPORTANT to use an external power source for the display when operating in pneumatic series mode. If the vehicle's electrical connections are of poor quality and the voltage disappears during testing, the electrically controlled pneumatic valves inside the device could close, abruptly cutting the air pressure to the trailer's brake system. This could have serious consequences for a technician working under or near the trailer. External power ensures the display and valves remain operational regardless of vehicle electrical stability.

 

13.3 WHEEL CHOCKING — MANDATORY FOR PNEUMATIC TESTING

WARNING — WHEEL CHOCKS:  It is essential to install a wheel chock system under the tires before performing any pneumatic gauge reading or series brake test. Never conduct air system diagnostics on an unsecured vehicle.

 

13.4 MAXIMUM OVERLOAD DURATION

WARNING — THERMAL HAZARD:  The electrical overload function is limited to 10 minutes of continuous use by the built-in thermal protection circuit. Prolonged use beyond this limit could cause internal components to overheat and, in extreme cases, set fire to flammable material placed under or near the device. Do not defeat or bypass the thermal protection.

 

LoadTRONIK LD1-G — User Manual  |  © 2026 RevTronik inc.  |  revtronik.com