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post #1 of (permalink) Old 07-26-2003, 06:03 PM Thread Starter
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Headlights are flashing update: shorting out

Here's the problem. CJ7: I turn the jeep headlights on. They stay lit for approx 5 minutes then start flashing randomly. I redid the grounds with no effect. I unhooked the parking lights and they don't make a difference either. If I unplug one headlight, the other one stays on more, but still flashes occasionally. The headlight switch is pretty hot where the two white wires go into it. I replaced the headlight switch 2 years ago, how do I tell if it's the switch or something else is bad?

It's almost like the something is "heating up", then starts to intrerupt the current to the lights. Any ideas?
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post #2 of (permalink) Old 07-26-2003, 06:22 PM
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Re: Headlights are flashing, need troubleshooting help

It is my experience that the first thing to go wrong w/ headlights is the dimmer switch on the floor. You can try by passing it to see if it is the prob.

Good luck!
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post #3 of (permalink) Old 07-26-2003, 06:27 PM
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Re: Headlights are flashing, need troubleshooting help

My money says a short on one of the hot wires. I've been through it before.
The headlight circuit has a automatic breaker and not a fuse in it. That way you won't totally lose your lights.
So start tracking down wires before you have a bigger issure.(fire?) I agree with the floor dimmer or even headlight switch. Also look at the wires that run through metal like the firewall for wear marks.
Good luck and let us know what you end up finding. (it can be a PITA sometimes)
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post #4 of (permalink) Old 07-26-2003, 07:15 PM Thread Starter
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Update

Okay I replaced both dimmer and headlight switches. No change. New development. I have continuity to ground on two wires going to the headlight switch. The red /w white stripe going to the floor dimmer and the single white wire going into the switch (not the two white wires going to the switch). The single white wire has melted the connector and is really hot! Both of the mentioned wires are somehow grounding out. I'll have to keep searching... Any tips on how to isolate section of my wiring so I can narrow it down?
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post #5 of (permalink) Old 07-26-2003, 08:41 PM Thread Starter
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Fixed!!!

Turns out headlight switch was the culprit. I think my trailer with a ton of lights overloaded the switch, melted it, and also wrecked the internal circuit breaker. I'll install a relay for the parking/running lights to prevent anymore melting.
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post #6 of (permalink) Old 07-26-2003, 09:04 PM
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Re: Fixed!!!

Cool. At least you found it in a minimal amout of time. [img]images/graemlins/40BEER.gif[/img]
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post #7 of (permalink) Old 07-27-2003, 05:34 PM
 
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Re: Fixed!!!

Sounds like a good time to upgrade by putting a couple of relays into the circuit!
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