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…

view full answer...

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…

view full answer...

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…

view full answer...

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…

view full answer...

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…

view full answer...

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.

view full answer...

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…

view full answer...

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…

view full answer...

Answer 9

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.…

view full answer...

Answer 10

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:…

view full answer...

Answer 11

Since the pin weight of your camper is 2.1k, I recommend going with the LoadLifter 5000 opposed to the 7500. While technically there is not reason you couldn't use the 7500 kit, it really is not necessary for a camper like yours. Generally the…

view full answer...

Answer 12

Hey Tim, the Brandmotion FullVUE Digital Rear View Mirror with HD Backup Camera #BM86YR that you referenced does come with a camera in the third brake light/CHMSL location that you asked about. I attached a picture that shows the contents of the kit…

view full answer...

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

Product Page this Question was Asked From

Featured Help Information

Instructions

Miscellaneous Media

Continue Researching