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Old 09-22-2014, 03:07 PM
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Rear Brake Lights

RIGHT rear brake light was out, so purchased a new bulb assembly. A couple of the contacts on the old bulb looked fried so thought that would fix it. It didn't. In fact when you turn the headlights on, the LEFT brake light doesn't work, but the right one does. The top brake light works when the headlights are either on or off. Turn signals work fine. Tried a new tail light assembly next (not OEM), no brake lights either side after that. WTF! Suggestions?

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Old 09-22-2014, 03:53 PM
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Re: Rear Brake Lights

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Originally Posted by ESchocklin View Post
RIGHT rear brake light was out, so purchased a new bulb assembly. A couple of the contacts on the old bulb looked fried so thought that would fix it. It didn't. In fact when you turn the headlights on, the LEFT brake light doesn't work, but the right one does. The top brake light works when the headlights are either on or off. Turn signals work fine. Tried a new tail light assembly next (not OEM), no brake lights either side after that. WTF! Suggestions?
Vehicle model, year, trim level... all help when asking for help.

Counterintuitively you may have a problem on the left tail light assembly.
Have even seen the bulb sensor [located on the left rear on some vehicles] cause issues, but it will be easier for someone to help you with basic info...
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Old 09-22-2014, 04:13 PM
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Re: Rear Brake Lights

Thanks! Lol! Yes, year make and model would be handy to have! It's a 2004 Grand Cherokee Overland. The contacts on the left side seem to all be ok, the burnt ones were on the right brake light socket. Guess I could swap the left and right assemblies and let them hang, to see if the problem changes sides. At this point I think it is the circuit board on the right side. Planning to try a new OEM right tail light assembly next, since the plug on the non OEM one didn't seem to fit all the way on.
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Old 09-22-2014, 05:13 PM
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Re: Rear Brake Lights

Quote:
Originally Posted by ESchocklin View Post
Thanks! Lol! Yes, year make and model would be handy to have! It's a 2004 Grand Cherokee Overland. The contacts on the left side seem to all be ok, the burnt ones were on the right brake light socket. Guess I could swap the left and right assemblies and let them hang, to see if the problem changes sides. At this point I think it is the circuit board on the right side. Planning to try a new OEM right tail light assembly next, since the plug on the non OEM one didn't seem to fit all the way on.
If you add your vehicle to your profile, you don't need to remember to include it.

Some of the aftermarket assemblies are OK, but most seem to be quality rejects from the Cheap Sh!t from China store.

Dunno your year, but there should be a bulb detector in the left rear of the cargo area. Those can act up.

If you can even just dangle the left side one from the right side to test, that may help you avoid unnecessary expense. [multiple online mopar parts dealers]

But the GCs are not known for quality of grounds is why I mentioned that it could be an issue over on the left. If you have a cheap Rat Shack [hurry before they close if you don't] DVM, you can put one probe on body and the other on the negative connector on the socket and have someone hit the brakes for you. Use a low scale as you don't want as much as 0.1 volt difference. Can also ohm out the grounds with a cheap meter.
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