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Old 01-18-2017, 10:48 AM   #1
issacengelby
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Problems with headlights on

So lately ive had a problem with my lights, when i turn on the headlights they work but the taillights, turn signals and brake lights dont work. But every once in a while they will such as yesterday morning everything worked with headlights on but then the next day they didn't. Can anyone help me solve this please?
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Old 01-18-2017, 03:54 PM   #2
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Re: Problems with headlights on

Welcome to AF. Unfortunately my "crystal ball" is on the blink and can't tell me what vehicle you have??
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Old 01-19-2017, 09:35 AM   #3
issacengelby
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Re: Problems with headlights on

1988 chevy silverado c1500
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Old 01-19-2017, 02:12 PM   #4
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Re: Problems with headlights on

Most likely a bad ground signal. That's the only thing those lites in the back have in common. If there is a trailer wiring plug, that could be an issue also.
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Old 01-19-2017, 02:23 PM   #5
issacengelby
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Re: Problems with headlights on

how do i fix the bad ground or identify where the problem is?
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Old 01-19-2017, 02:54 PM   #6
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Re: Problems with headlights on

Quote:
Originally Posted by issacengelby View Post
how do i fix the bad ground or identify where the problem is?
If you have to ask that question, there are three answers:
1. Buy a REAL service manual, study the wiring schematics, probe wires and connectors, and repair as needed.
2. Find a mentor to help you with #1.
3. Take it to a competent repair shop.

I would remove the taillights. On the back side of the taillight, there's a long, narrow circuit board held on with a few screws. The original circuit boards were known for corrosion; and even the GM-updated ones corrode. I've had to replace the circuit boards for the taillights on my '88 twice now--once when I bought the vehicle back in '97, and again last summer. The original '88 circuit boards used round, brass-based bulbs. The updated boards use "flat" plastic-based bulbs. Boards are available from any auto parts store, or (probably) from GM. My first replacements came from GM, the second set came from NAPA.

As said, the trailer harness connector (if used) is also suspect. My truck had one when I bought it, it lasted about three years after that, and then had to be replaced again. Available from any auto parts store.
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Old 01-19-2017, 03:41 PM   #7
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Re: Problems with headlights on

With the headlight switch on, and someone watching the tail lights, try wiggling the wire harness at the rear. If the lights blink on or off, you've maybe narrowed it down some.
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Old 01-31-2017, 04:13 PM   #8
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Re: Problems with headlights on

had the same problem. after going through all the bs, bought new tail light assembly's. no problems since, new lights look nice also. buy new assembly's online, save yourself the headaches.

http://www.ebay.com/itm/Tail-Light-A...RYiXcF&vxp=mtr

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