Head light relay location??? - S-10 Forum
 
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post #1 of 9 Old 12-12-2010, 09:12 PM Thread Starter
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Head light relay location???

Hey guys Im having some issues with my headlights going off and on in my 95 GMC JIMMY, Im thinking its the relay but Im having a hard time finding the damn relay. Ive done a search and still unble to get an a straight answer.Ive read thats its behind the glove box, some threads are saying its in the engine bay?Any help would be appreciated.

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post #2 of 9 Old 12-12-2010, 09:16 PM
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Re: Head light relay location???

Headlights don't have a relay for 95. Just the headlight switch. Look at the wiring diagrams in my sig for more info.


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1982 Dodge W250 360/NP435/NP208 lifted on 36's, mud toy.
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post #3 of 9 Old 12-13-2010, 11:55 AM
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Re: Head light relay location???

on my 97 blazer, all the headlight relays are in the glove box, i dont know about the 95, i know they changed a bunch of crap going into the 96-97. but phoenix is sayin that there isnt one, so im sure there isnt! what exactly is the problem youre having with your headlights though?
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post #4 of 9 Old 12-14-2010, 08:15 AM
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Re: Head light relay location???

In the glovebox, there is a Daytime Running lamps relay (If applicable). To access, you need to push on the top center of the access door and push down. There should be a up to 3 relays behind the panel. I believe they are (not in any order) DRL relay, Fuel Pump relay, and horn relay. I believe that is their location, 94 doesn't have the relays in the glove box, so it's a bit different for me.

But on 95-97, there isn't a "headlight" relay. The Headlights power goes through the multifunction switch. And while there were some subtle changes, 95-97 are about the same in how they are designed to work.


For Composites: If the DRL relay is bad, it shouldn't effect the headlights. The DRL is a parallel circuit to the headlight circuit, but if the relay goes bad, it's possible the left high beam won't work. This would be unlikely though as the DRL relay would have to lose connection or be stuck in the "on" position as the high beam ground is through the normally closed side of the relay. 96-97 is slightly different, but they both are very similiar in how they work, and the same thing applies. Neither one have "headlight" relays. If you don't have DRL's, then you won't have any relays in the headlight circuit.

For sealed beam: If the drl relay is stuck in the "on" position, the whole left headlight may not work, as the DRL relay is the ground for both high and low beam on the left side. Or it's possible the the ground will back feed through to the right side, making both headlights very dim. HI's and lows will be effected in this scenario. If you don't have DRL"s, then once again, no relays in the circuit.


OP: Could you tell me more about your problem, is it constant? How long does it take for them to turn off, and how long before they come back on? I'm guessing it could be a bad ground, or possibly a bad multifunction switch or headlight switch. I need a little bit more info to help you diagnose your problem.


2011 Silverado, 4.3 RCLB 61,xxx miles
1994 S10 160,XXX miles. Lifted 4/3
1985 Ramcharger Royal SE Prospector 440/727/NP203 (beach toy)
1982 Dodge W250 360/NP435/NP208 lifted on 36's, mud toy.
Wiring Diagrams and Misc. Repair
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post #5 of 9 Old 01-11-2011, 12:36 PM Thread Starter
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Re: Head light relay location???

Holy smokes, havent been on here in a while. First of all thank you guys for the reply. I havent driven my truck for this very reason untill yesterday. I started my truck then turned on the headlights, the headlights turned on and stayed lit for about 3 minutes then turned back off. Headlights never came back on. Itll do this very same cycle.

Now the funny thing is that the only reason I thought that it would was the headlight relay is because I initially purchased a "headlight relay" and was provided one by advance auto.I believe they made a mistake and that thier not entirely sure what year a headlight relays applied to,
Anyhow where should I physically start to diagnose the problem? headlight switch? ground?
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post #6 of 9 Old 01-11-2011, 04:01 PM
i saw what you did there!
 
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Re: Head light relay location???

parts stores of this type arent welll known for having accurate listings and applications info especially for items such as this

best thing to do on something like this is to call the local chevy dealer parts counter and get a part number and then cross reference at a store

many different vehicles parting out, engine underhood dash electrical and more parts! cars, trucks, fords, chevies, etc. - text me 217 671 7792 anytime! Own: '54 F350 dually, '54 & '57 F100's, '57 Bel Air gasser, '68 Corvair Monza 'vert. '72 Chevelle SS HT, '82 K10 SF, '85 Elky SS 310ci, '93 C1500 4.3L Z
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post #7 of 9 Old 01-19-2011, 01:50 PM Thread Starter
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Re: Head light relay location???

Problem fixed. Replaced relay in the glove box.. Thnx for the help guys
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post #8 of 9 Old 01-21-2011, 12:16 AM Thread Starter
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Re: Head light relay location???

Damn! I spoke too soon, its doin it again. What to do? what to do?......
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post #9 of 9 Old 01-22-2011, 11:33 PM Thread Starter
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Re: Head light relay location???

UPDATE: I went ahead and replaced headlight switch. So far so good... (fingers crossed).
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