How To Fix Check Trailer Rear Lamp Message On 2022 Chevy/GMC with Tailgate Light Bar

Question

Question:

Hooked a light bar under the tailgate used the T- connector 7 pin to 4 pin , to trailer tow package.All connected works great But every time you press on the brakes, it says- Check Trailer Rear Lamp- and goes away when you release the brake on the instrument panel.

asked by: Victor B

0

Expert Reply:

I do have an option for you but this due to the internal computers and programs on the truck which can't be bypassed. That said, you can trick them and for this I recommend purchasing an adapter like the 7-Way RV to 4-Way Flat Trailer Connector Adapter part # HM47365 and then using load resistors like the LED Load Resistor Kit part # DI34ZR. This will simulate a full load on the truck tail light circuits.

expert reply by: Conner L

0

Matt T.

11/10/2024

Ca. Warranty or something do something to the computer to stop it? I have the same issue. Seems like it start on a rainy day

Kevin C.

11/11/2024

@MattT No, the truck system is designed to sense for that specific signal and since LED lights require less power they can't trigger the sensor without adding in load resistors. It would require GM to use a different signal to sense the trailer or add in some kind of parameter to the system to sense the lower amperage of the LED lights.

Answer 1

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 2

To add a 3rd brake light to a trailer's existing lighting will require a signal converter to separate out the brake signal from the turn signals that are combined by trailer wiring. You need the converter #118158 to provide a brake-only output…

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Answer 3

Hey Peter! If you can find an LED compatible 2057 bulb then yes you can replace it but we do not have one so sorry I can not help you there. As far as adding a resistor goes, maybe? You may not need load resistors when you switch to LED bulbs. The…

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Answer 4

Hi Jose, If you're saying you want to switch both tail lights to LED light strip-style tail lights then I have a few recommendations depending on the length you'd like: 12-5/8" long x 1" wide x 1/2" tall: Thinline LED Trailer…

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Answer 5

The hyper flashing due to LED lights on your trailer is often solved with the 7-way adapter you mentioned the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End #20142. The issue is often that LED's pull so…

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Answer 6

The Diamond LED Light Bulb Load-Resistor Kit #DI34ZR wires in parallel with each trailer lighting circuit. For a trailer with LED lighting (that does not present the same electrical load as an incandescent type bulb) you will wire one resistor inline…

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Answer 7

LED type trailer lights use very little power, about one-tenth the amount required by standard incandescent light bulbs. This can cause some wiring systems to not "see" the trailer lights because their current draw is so low. In some cases…

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Answer 8

You will wire a load resistor into the wiring of each light socket that has an LED bulb and flashes. So basically you will need to wire a load resistor into any bulb that blinks or has a dual intensity feature that lights up when the brakes,…

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Answer 9

When someone is experiencing out of control or hyper flashing turn signals, a few things come to mind. First would be, does the trailer have LED lights? If so, installing load resistors, #DI34ZR, on the turn signal circuits should solve the problem.…

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Answer 10

Hi Richard! It sounds like you're needing to install the Load Resistor Kit for LED Turn Signals #DI34ZR on the turn signals you've installed on your toolbox. Since LEDs don't require as much power as incandescent bulbs, sometimes we see…

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Answer 11

The load resistors #DI34ZR put out 6 ohms resistance each and you most definitely can install them yourself. I've attached a photo of the correct installation method to assist. They will get warm to the touch but you can absolutely install them…

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Answer 12

Hey Alex, thanks for reaching out! It could be that your load resistors aren't working properly, but I'm just wanting to check and see if you've installed a load resistor on each light, or just certain ones. It would also be helpful to…

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How To Fix Check Trailer Rear Lamp Message On 2022 Chevy/GMC with Tailgate Light Bar

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