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Short to headlights?

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Old Oct 23, 2015 | 10:24 PM
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Default Short to headlights?

Headlights all come on, or only the far right bulb. I have switched the instrument panel fuse which has fixed nothing.

Sometimes all of the lights come on, but after a drive or just sitting just one will come on. Needless to say it cannot be driven at night.

The lights pull lever works, and turning it left or right to dim the gauge lights does nothing to effect the headlights.

I'm guessing there's a short but wanted the opinion of members here. Sound like the fuse box? maybe the light switch?
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Old Oct 24, 2015 | 08:44 AM
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Over time the electrical plugins at the headlight bulbs get real corroded but by spraying WD-40 into them and plugging them and unplugging them about 8 to 10 times usually takes care of the problem.
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Old Oct 24, 2015 | 09:47 AM
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Originally Posted by S**ttersFull
...The lights pull lever works, and turning it left or right to dim the gauge lights does nothing to effect the headlights...
It's not supposed to. The rheostat is only for interior lights. Headlights are simply pull on, push off.

Have you checked the forward lamp harness ground on the radiator support?
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Old Oct 24, 2015 | 12:09 PM
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Carefully check the headlight connectors paying special attention to the contacts as seen from the back of the connector--they should all be inside the connector body at the same level. Sometimes the contacts inside the connectors become loose and you get intermittent operation of the exact sort you mention. Usually (but not always) just pushing the contact back into the connector will re-lock it.
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Old Oct 25, 2015 | 10:58 AM
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Check your connectors... . more than likely that's where you'll find the issue.

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Old Oct 25, 2015 | 01:31 PM
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Could this possibly be the light switch mechanism? Or would that cause all the lights to go faulty?
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Old Oct 25, 2015 | 01:49 PM
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Originally Posted by S**ttersFull
Could this possibly be the light switch mechanism? Or would that cause all the lights to go faulty?
Not if it is affecting only one low or high beam bulb. There is only one power lead from the switch for either both high or both low lamps.
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Old Oct 25, 2015 | 01:53 PM
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Originally Posted by S**ttersFull
Could this possibly be the light switch mechanism? Or would that cause all the lights to go faulty?
Headlights don't have a fuse they have a built in circuit breaker in the switch. I don't know what year car you have but if it's an older model c3 the dimmer could be bad on the floor causing either the bright or dims to intermittently work and you could have a bad connection or a bad bulb on whichever one doesn't work individually. Post the year of your car and I'll give you some information
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Old Oct 25, 2015 | 01:53 PM
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Alright, next week(or since it's Sunday, this week) I will be pulling everything apart to find the culprit. Will report back with what the issue is.
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Old Oct 25, 2015 | 02:06 PM
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First thing I'd check is to make sure the dimmer switch isn't causing part of your problem. I remember you now. I helped you find your problem with the tail lights. You need to fill out your profile, or start mentioning the year of the car in your question. Did you ever check the small fuse for your instrument lights problem we discussed?

Last edited by 65GGvert; Oct 25, 2015 at 02:09 PM.
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