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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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1984 toyota sr5 4x4
22r w/ weber 32/36
Pro comp 4" front springs & 3" rear downey spring
Home made On-board air system
V6 4.88 lock rites F & R
Bilstein 7100 reservoir shocks
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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
Jenn and Justin

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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.
1994 Toyota 4Runner SR5 4X4
221,500 miles and counting
3.0 V6, 5 speed
10/15 MPG city/hwy(with 33's)
Current Mods
Headers, 2.5" Flowmaster custom exhaust, K&N FIPK
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Ranchos x4, 2" Lift Downey coils
33-12.50 M/T's, 1" t-bar lift, 1" body lift
Tow pkg w/ lighthookups
Silverstar Headlights, Pioneer Deck w/XM
250Watt JLAudio 8" W3 Sub

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12V Aux outlet-400/800peak inverter
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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.
1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs
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Old 09-01-2007, 07:56 AM
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1984, 2002, 4runner, 4x4, 84, 86, f250, ford, headlight, headlights, lights, randomly, shut, toyota, turn

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