Johnnyh Posted November 29, 2015 Report Share Posted November 29, 2015 (edited) I pulled the third brake light on my 2016 DJ. Neither wire feeding the light tests out to ground at 12v so I don't know which is hot. Funny thing is there is a reading between the two wires feeding the light of 21. Thought my tester was good. One wire is Blue/black and the other green/white. Any ideas would be appreciated. Edited November 29, 2015 by Johnnyh dhh3 1 Quote Link to comment Share on other sites More sharing options...
B4ZINGA Posted November 30, 2015 Report Share Posted November 30, 2015 If I was looking at it, I'd make the educated guess that the black wire is ground and white is hot. Try it out -- if I was wrong, flip it and try again. Silly question, but was someone stepping on the brake pedal while you were checking for the hot wire? I'm assuming there was. dhh3 1 Quote Link to comment Share on other sites More sharing options...
dhh3 Posted November 30, 2015 Report Share Posted November 30, 2015 (edited) Black is ground, white is hot. Very simple installation. I bought the one that flashes 8 times, with an 8 second delay so it does not constantly flash in stop and go traffic. I wrote about this somewhere on the forum. Edited November 30, 2015 by dhh3 11journeybama 1 Quote Link to comment Share on other sites More sharing options...
Johnnyh Posted November 30, 2015 Author Report Share Posted November 30, 2015 DHH3, your 2014 is the car you did the brake flasher on I guess? Was the third brake light LED and did it have a two wire male clip with two thin wires one white / green and one black. I have three inches of wire to work with at the body hole for the light. Planned on prying off the trim above the tailgate inside for the wiring but wanted to get it straight first. I have one chance to make it right as the splices need to be installed and the power needs to be correct to feed the brake blinker control. Then the hot needs to be cut between the splices. The installation is simple but I want to be sure so i'm not out in the garage soldering a mistake back together on a car with 1000 miles on it. I do appreciate your help. I work on buildings and have owned and built Harley's and hotrods since I was 16 but auto wiring in new cars is new to me. Thanks dhh3 1 Quote Link to comment Share on other sites More sharing options...
dhh3 Posted November 30, 2015 Report Share Posted November 30, 2015 My third brake light is LED. You are correct: not much wire to work with. I usually solder, then tape off any connections that I make. I just pulled the wires out as far as I could, and used their plastic splicers. I just took a wild stab at the black being ground! Lucky guess. Quote Link to comment Share on other sites More sharing options...
20journey11 Posted December 2, 2015 Report Share Posted December 2, 2015 The dealer I bought my Journey from installs the brake flasher on all their new vehicles. Then adds $300 to the car for that option. Quote Link to comment Share on other sites More sharing options...
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