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2012 Grand Cherokee Tail Light Wiring Diagram

RBugnitz

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1,203 Posts

Discussion Starter · #1 · (Edited)

In middle to hooking up my reverse fogs for the Jeep. Need to tap in to the brake light but want to make sure im connecting correct wires. Can any one please inform me on what the 3 wires are? NEed to know:

Tap the red wire to taillight light positive.
Tap black wire to the ground.
Tap blue wire to the brake light positive.

All i see from brake light is 3 wires...Black, Green/White, and yellow/White

Pleas e let me know asap as trying to get these installed before a 1:00pm appt. and "im dead in the water" right now lol

RBugnitz

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1,203 Posts

Discussion Starter · #2 ·

NM... Got it figured out. Black went to black obviously... and was just tried one or the other till it worked!. Will get some pics up later.

El Jefe

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1,696 Posts

Aftermarket fogs? Where did you mount them?

RBugnitz

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1,203 Posts

Discussion Starter · #4 ·

Aftermarket fogs? Where did you mount them?

Aftermarket "reverse fogs" (AKA lower brake light) LOL... got them form a fellow forum member. PM me and can send you link of where to get em. But im still having issues as can see in video... not sure if its the Kit or the wiring... but it works pretty well for the most part minus not flashing left light when Lights are turned on... works fine when no lights are on... working with supplier on getting replacement.

KMdef9

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2,544 Posts

Maybe you have the wiring backwards one the left.

So it blinks when the parking lights are turned off? But doesn't when on?

The white wire is brake light, black is ground and the white/brown should be your park lamp. The green one if for your reverse lamp, shouldn't use that one.

If you have a test light, see which one does which on the harness side. Then, hook up the ground on your aftermarket light, and hook up one wire at a time. The blinking should be brighter than the park lamp.

RBugnitz

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1,203 Posts

Discussion Starter · #6 ·

Maybe you have the wiring backwards one the left.

So it blinks when the parking lights are turned off? But doesn't when on?

The white wire is brake light, black is ground and the white/brown should be your park lamp. The green one if for your reverse lamp, shouldn't use that one.

If you have a test light, see which one does which on the harness side. Then, hook up the ground on your aftermarket light, and hook up one wire at a time. The blinking should be brighter than the park lamp.

Thanks brotha, will have to get back in there and check that. Thought i had followed/traced the correct wires to the brake light but will confirm. Was a few beers in on the second side install lol.

KMdef9

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2,544 Posts

Thanks brotha, will have to get back in there and check that. Thought i had followed/traced the correct wires to the brake light but will confirm. Was a few beers in on the second side install lol.

Not a problem. Take some pics of the wires of the connector too, that way you have something to post if it doesn't work out.

Took me a pulling out my meter to fix mine. I should have done that in the first place instead of doing trial and error. Lost a few fuses too.

Do you know what wires on the aftermarket stuff are for? Aftermarket stuff is always funny, I've seen black be +, white be ground, etc.

RBugnitz

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1,203 Posts

Discussion Starter · #8 ·

So after talking with the manufacturer of the kit i bought. He claims it NOT suppose to be a blinker when tails are on, only brake light and turn signal when lights are off(other wise just tails/drl). They where shocked and confused how i got it to blink like that in the first place. So I reversed cables on passanger side and now it works as they are suppose to... Kinda disapointed as i really like them to flash as a blinker when lights are on like my '07 did with the TLS harness. Any one else confirm if there lower/reverse fogs blink? Theres gotta be a way to make it work since one side was already working like i want/should... Just want to confirm before i try installn relays. to fix issue... but would rather stay away form using them. Any more thoughts?

Source: https://www.cherokeesrt8.com/threads/wk2-brake-light-wire-diagram-asap-help-needed.215041/

Posted by: marquismargarise0198993.blogspot.com

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