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Headlights shut off randomly

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Old 08-31-2007, 11:51 PM   #1
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Headlights shut off randomly

My friends 87 pickup started having a weird headlight problem. When he has his headlights on they will somtimes shut off for about 2-3 sec then turn back on. All the other lights stay on, just the headlights go out. Ive gone around and checked connections and grounds and it still does it. Any help would be appreciated.
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Old 08-31-2007, 11:54 PM   #2
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I'm curious as well...my 86 has done that a few times
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Old 09-01-2007, 12:45 AM   #3
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Bad Relay??? Does an 86 even have relays? I'm a 2nd gen 4Runner guy, but I can offer you my 2 cents, since cars are SIMILAR, but not the same.
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Old 09-01-2007, 07:56 AM   #4
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Likely the headlight/combo switch:

Easy test is next time they go out, pull back on the combo switch and if the lights come on (flash mode) then the factory relay, fuses and wiring are fine. Flash mode uses separate contacts in the combo switch, so that is the only change between normal and flash mode.
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