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Aug 21, 2001 | 08:14 PM

79fordslug

Thread Starter

Senior User

Joined: Mar 2001

Posts: 118

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brights

when I go to hit my brights, the headlights turn off completely. Is it something in the switch, or the bulbs themselves?

Aug 21, 2001 | 08:25 PM

shortbedford

Junior User

Joined: Apr 2001

Posts: 71

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brights

hey fordslug i ave actually seen both high beams burned out atthe same time but not very often. you probally have a bad dimmer switch see if you have 12 volts to the head lites. if you do then you have bad bulbs if not ???? dimmer switch ??? hope that helps some.

Aug 21, 2001 | 11:55 PM

Nod

Elder User

Joined: Nov 1999

Posts: 796

Likes: 3

From: Anderson Northern Ca

brights

Hey Fordslug, I had the same problem on my 72 F 100. I had a dead short in the high beam wire that runs past the battery box.Over the years vibration caused the insulator to wear thru at the battery box, so every time I turned on the high beams they cut out emediatley. I found the problem after much searching and reinsulated the wire then cut a length of plastic line lengthwise and forced it over the wire at the point where it wore thru. That was about 11 years ago and the lights still work fine.Good Luck, hope this helps.

"bowties in the rearview mirror"