Tail lights acting weird - Chevy Impala SS Forum
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post #1 of 12 (permalink) Old 07-22-2017, 02:36 PM Thread Starter
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Tail lights acting weird

I'm having trouble with my sequential tail lights. (Blink blink)

When using the turn signals only the inner and center lights blink.

When using the hazards all the lights work.

When the exterior lights are on only the inner and center lights blink. BUT on the right side the inner most light is brighter than the rest.

I've checked all the grounds in the trunk and they are all clean. I looked at the wiring on the back side of the tail lights and everything looks clean and intact. Nothing looks pinched or broken.

I looked under the car and the harness looks ok.

I had my rear bumper repainted recently so I know they had to remove the rear tail lights to paint it but I have no idea if they were working right before hand or not. I'm PRETTY sure they were working right but I really can't remember the last time I looked at my tail lights.

I can't think of anything they would have messed up except the wiring right behind the tail lights and it all looks intact to me. It's been years since I installed the sequential kit so I don't have the instructions anymore. I also emailed pyramid audio to see what they say.

Ergh... you fix one problem and you cause another. Frustrating.
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post #2 of 12 (permalink) Old 07-22-2017, 03:09 PM
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Check inside tail light harness where individual grounds are spliced together. Wouldn't hurt to check all the splices,but not sure how easily that can be done with bumper cover in place

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post #3 of 12 (permalink) Old 07-22-2017, 03:11 PM
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I would start by replacing ALL the bulbs. I chased an issue once and it turned out to be a bad bulb even though it didn't appear bad. Bulbs are cheap enough and they do get dimmer over time as well. I just finished installing my blink blink last week. There's nothing in the instructions that should concern your issue but if needed I could scan it in for you and post it here.

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Last edited by 4x4high; 07-22-2017 at 03:14 PM.
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post #4 of 12 (permalink) Old 07-22-2017, 04:39 PM Thread Starter
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Originally Posted by 1slow96 View Post
Check inside tail light harness where individual grounds are spliced together. Wouldn't hurt to check all the splices,but not sure how easily that can be done with bumper cover in place
You mean there's splices in the harness that runs between the two tail lights? Yikes lol

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Originally Posted by 4x4high View Post
I would start by replacing ALL the bulbs. I chased an issue once and it turned out to be a bad bulb even though it didn't appear bad. Bulbs are cheap enough and they do get dimmer over time as well. I just finished installing my blink blink last week. There's nothing in the instructions that should concern your issue but if needed I could scan it in for you and post it here.
I think I might try that. I have seen where they don't blink anymore but they can still light up.

One of the lights that wasn't turning on did still blink when I switched it to a different socket.
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post #5 of 12 (permalink) Old 07-22-2017, 04:52 PM
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Each location has 2,or 3 wires coming from them that get "ganged" together at some point. The grounds share the most wires followed by the parking light circuit...


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post #6 of 12 (permalink) Old 07-22-2017, 11:46 PM Thread Starter
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Each location has 2,or 3 wires coming from them that get "ganged" together at some point. The grounds share the most wires followed by the parking light circuit...
Hmm...I wonder if they pinched something behind there? Everything looks OK from underneath but you can only see so much. If I have to take the bumper cover off then I might as well take it back to the shop and let them deal with it. Not worth risking scratching it if they caused the problem.

dammit lol
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post #7 of 12 (permalink) Old 07-23-2017, 07:06 AM
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I wouldn't take it back. Crimps corrode over time (especially,over 20 years)... I had my bumper cover repainted,and did the R&R myself. Gently removing cover,and setting it aside will give you all the access you'll require to unwrap/inspect entire harness. I spliced in an additional ground wire on the passenger side with a ring terminal to manually ground to the underbody as further insurance.

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post #8 of 12 (permalink) Old 07-23-2017, 11:26 AM
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Sequential lights may not all light if your lighting circuit doesn't stay active long enough. You could have a burnt bulb causing a sort of hyperflash which doesn't give the bulbs enough time to flash. Could be a worn out flasher module too. I bet if you apply power directly to the light circuit for that side you will find your sequential lights do actually work sequentially.
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post #9 of 12 (permalink) Old 07-23-2017, 11:39 AM Thread Starter
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They do flash pretty fast I noticed.

I got new bulbs I'm gonna put them in in a few few minutes.

Also the kit came with a new flasher module but I guess that is possibility too. I think I have the original one in my parts bin but obviously that wouldn't help or they wouldn't replace it with a different one.
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post #10 of 12 (permalink) Old 07-23-2017, 01:39 PM Thread Starter
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Quote:
Originally Posted by 1slow96 View Post
I wouldn't take it back. Crimps corrode over time (especially,over 20 years)... I had my bumper cover repainted,and did the R&R myself. Gently removing cover,and setting it aside will give you all the access you'll require to unwrap/inspect entire harness. I spliced in an additional ground wire on the passenger side with a ring terminal to manually ground to the underbody as further insurance.
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Originally Posted by rodney View Post
Sequential lights may not all light if your lighting circuit doesn't stay active long enough. You could have a burnt bulb causing a sort of hyperflash which doesn't give the bulbs enough time to flash. Could be a worn out flasher module too. I bet if you apply power directly to the light circuit for that side you will find your sequential lights do actually work sequentially.
Ok so I changed all the bulbs and nothing. Same problem.

So I went digging through my parts bin and found the old flasher module. Plugged it in and viola no more problem!

IDK why they give you a new flasher with the sequential kit...I remember it said the OEM one would make them blink too fast but they work just fine. Philips OEM 22 years old still kicking vs cheap Tiawan crap - dead after 2 or 3 years lol

Thank you!
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