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Old 12-15-2013, 10:13 AM   #1
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Headlight short?

I turned my Jeep on last night to pull out a coworker that was stuck in my yard. Flip the lows on and the drivers side is burnt out and it was working just fine last week, previously replaced it about a year ago. No big deal, then when I pull up to his car I throw the high beams on so I can see where to hook my strap up to. While I'm under his car my high beams start flashing about the same pace in which the hazards flash (hazards weren't flashing). After about a minute of that they stopped and just held steady.

Where is the short most likely occurring? If I have to replace all the wiring I might as well upgrade to the HIDs with a thicker gauge of wire.

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Old 12-15-2013, 10:59 AM   #2
Guesses a lot ;)

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Probably the switch or the plug at the light. Should be a simple fix

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Old 12-15-2013, 11:33 AM   #3
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Sounds like a good excuse to to the headlight relay mod.
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Old 12-15-2013, 01:20 PM   #4
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I wound up replacing both headlights with GE Halogens. My drivers which was burnt out was a GE Halogen already (but heavily corroded green contacts) and the passenger was a Sylvania Halogen. If I remember correctly I only replaced the passenger one about a year ago because the lens was crudded up and foggy.

Hopefully the problem was just the corroded contacts.

Here's another question. The headlight contacts have dimples, are they supposed to go into the terminal housing and lock in or is it supposed to prevent you from plugging in too far? Mine stops at the dimples and won't go on any further. Just wondering.

I'll keep an eye on it, however I only drive my Jeep on the weekends, sometimes once every 2 weeks if that.
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Old 12-15-2013, 10:47 PM   #5
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The dimples are designed to help "lock" the plugs onto the light. I would check the plugs, if you had corrosion on the headlight terminals, then there is corrosion in the plugs as well.

You might need to replace the plugs. NAPA makes a replacement plug, but get the heavy duty one instead of the regular, it comes with a thick plastic plug, and the wires are sealed coming out of it. No moisture to get in there. They come with about 6-8" of wire to splice into. If you replace them, get a small tube of dielectric grease to coat the terminals as well as in the plug, this will help prevent the corrosion from happening again.
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Old 12-17-2013, 04:29 PM   #6
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Quote:
Originally Posted by 0III0forlife View Post
The dimples are designed to help "lock" the plugs onto the light. I would check the plugs, if you had corrosion on the headlight terminals, then there is corrosion in the plugs as well.

You might need to replace the plugs. NAPA makes a replacement plug, but get the heavy duty one instead of the regular, it comes with a thick plastic plug, and the wires are sealed coming out of it. No moisture to get in there. They come with about 6-8" of wire to splice into. If you replace them, get a small tube of dielectric grease to coat the terminals as well as in the plug, this will help prevent the corrosion from happening again.
Thanks for the info.

I'll get the shop to upgrade the housing plugs. The prongs on the driver light were green and corroded, that's def. gotta be it and probably the cause of the short. The PO must not have known they were corroded either, since I hadn't changed the driver light until a few days ago. The lamps not being fully plugged, being exposed, was probably the cause of the short since it was snowing and raining heavily all day when I experienced the issue.
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Old 12-17-2013, 05:34 PM   #7
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o'reilly sells packets of battery terminal grease that helps stop corrosion and i use it as well, i would use it for the head light plugs like 0III0forlife said.

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