Third Brake Light Still Flashing After Installing the Pacer 3rd Brake Light Module

Question

Question:

Hi, i am trying to wire an LED 3rd brake light for a camper shell on a 2018 silverado. I am wiring into the trucks 7pin trailer harness to get the connections i need. The caps led dome light is wired up and working as expected. To wire the 3rd brake light, i tried the pacer 20-702 module, and have it wired per the instructions into the 7pin harness. There is a fuse between the module and the light. Problem is, the 3rd brake light flashes with either of the blinkers being turned on. Can you recommend any troubleshooting to try? Could i just have a defective module? Thanks

asked by: Chad

0

Expert Reply:

To me it sounds like you just have a defective unit and just need to replace it. The purpose of the module # PP20-702 is to filter out the turn signal and illuminate the 3rd brake light only.

So, if it is not doing that and you've confirmed you wired everything correctly, you'll just want to replace it. I have attached a wiring diagram for you to check out to verify that you've wired everything correctly.

expert reply by: Bryce D

0

PP20-702 Wiring Diagram
(click to enlarge)

Answer 1

For your 2021 Chevrolet Silverado you will have to splice into the factory wiring to use the 3rd Brake Light Logic Module #PP20-702 to connect the left and right turn signals, along with the green wire. You can also combine this harness #PP20-702…

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Answer 2

Thanks so much for the picture. It looks like you're wiring up the Pacer Module #PP20-702 to a trailer side 7-Way connector, which you then plug into the 7-Way on your truck to power the topper's lights. I was able to zoom in on the connector…

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Answer 3

In order to successfully wire in a third brake light on a camper shell you need to identify first if the taillights on the vehicle are combined or separate meaning, are the stop and turn signals on the same circuit or separate. If they're…

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Answer 4

I understand your frustration with wiring the 3rd Brake Light Logic Module, part #PP20-702. The wiring diagram provided is not very comprehensive. While we do not have another diagram to send, I can explain this in clearer terms. The module is meant…

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Answer 5

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 8

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 9

Hey Jonathon thank you so much for all of that additional information! To haul your bikes behind your class C Sprinter motorhome, while flat towing your Mini, I recommend the Hollywood Racks RV Rider Bike Rack item #HLY64FR and the Roadmaster Dual…

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Answer 10

Hey Charles, since you are looking for a Goodyear tire size ST225/75R15 mounted on a wheel with a 6 lug wheel the part #GY97QB would be a really great option. This has the tire you are looking for mounted on a really nice aluminum wheel that will…

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Answer 11

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 12

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Third Brake Light Still Flashing After Installing the Pacer 3rd Brake Light Module

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