Subject	Taillight Trouble
Posted by	Rossm952 on August 09, 2020 at 6:30 PM
	This message has been viewed 188 times.
Message	Hello, I’m hoping someone can point me in the right direction please. I will start off by saying I don’t know much about electrical work and I’m a bit out of my depth trying to diagnose the problem here. I got around to replacing my back-up lamp sensor a few weeks ago and now have 1 last lighting issue to address – the taillights. All of my exterior lights are working including the turn signals, headlamps, fog lights, reverse lights, and brake lights, but the taillights do not light up when I turn on the headlights. I honestly am not sure if the taillights have worked since I bought the car last year, but I do know that I was getting the dash brake warning light for a while when I braked. Didn’t drive the car much because I was doing a lot of work to it, but now the dash brake light does not come on when I brake. I have replaced all 4 taillight bulbs with new 1157s. None of the sockets looked corroded. I have also checked all of the standard sized fuses in the kick panel and under the hood using a multimeter. I have read through numerous other posts and convinced myself the issue was most likely the taillight sensor relay, so I picked up a replacement from a junkyard and installed it, but no luck. Figured that one could have been bad too, so I had my father-in-law take the circuit boards for both and re-flow the solder on them. He told me the solder didn’t look bad to begin with, but he did it anyways. After I tried them again the taillights still didn’t illuminate when I turned on my headlights. I don’t really care about the idiot dash light so I tried bypassing the sensor using the initial poster’s method in this thread https://forums.nicoclub.com/diy-tail-light-sensor-bypass-nissan-t575420.html . I connected 4 (red/black) to 5 (red/green) and 2 (green/red) to 7 (yellow/red) and 8 (red/black). That didn’t change anything, so I also tried the follow-up poster’s method in the video. Looks like he did 7(yellow/red) to 2 (green/red) and 4/8 (red/black) to 1 (red). No change, my brake lights still worked fine, but the taillights don’t light up when the headlights are on. Is it safe to say that the relay isn’t the issue? What can I check next??? Any help is greatly appreciated. I want to be able to drive the Z at night safely!
Follow Ups	Taillight Trouble - Rossm952 18:30:53 08/09/20 Do you have the correct 2 filament bulbs in the 4 upper? (n/m) - Bernie (NoVA) 18:55:42 08/09/20 Yes, I Believe So - Rossm952 21:07:39 08/09/20 So your brake lights work, but the rear markers dont (n/m) - Bernie (NoVA) 00:40:46 08/10/20 Sorry if I am using the wrong terminology, it's these 4 - Rossm952 14:45:47 08/10/20 Inspect all wiring behind trunk panels back of tailights (n/m) - Drk93TT 05:37:11 08/10/20 Thanks for the suggestion, I have the 3 rear interior hatch - Rossm952 14:56:58 08/10/20 You say all the other lights work, including the rear side - itsa300zx 17:15:26 08/10/20 Actually I had only checked the main front and rear turn - Rossm952 22:40:46 08/10/20 Checking circuits - running/parking lights - scorp997 23:17:31 08/10/20 Good to know, I don't see a clearly labeled fuse for the - Rossm952 10:45:50 08/11/20 Start chasing the wires back to see if you get any power G/R - itsa300zx 13:00:00 08/11/20 Thank You!!!! - Rossm952 21:39:51 08/11/20 NP, glad to help. Nice that you found the problem. (n/m) - itsa300zx 21:48:54 08/11/20 Good work - scorp997 01:54:49 08/12/20
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