No Headlights

stock02s10 · 03-06-2009, 09:57 AM

Hey everyone,

I currently have all exterior lights working except my head lamps(also DRL IS OUT) on my 2002 S10 LS EXT CAB. A few months ago when I would drive at night my lights would flicker every now and then. Then it got to the point where at night if i turn on my truck it would take a few seconds for the lights to come on, and sometimes when driving they would shut off and come on again after a few seconds. Now they aren't working all my other lights are working, signals, brake, and back up. I have checked all fuses they are good. When I turn on the lights manually you can hear the circuit for the fuse under the hood clicking (fuse gets warm), and it gets warm so I know it's getting power there. I pulled off the front end clip and looked at the wires they all seem to be good. Anyone know of anything else I can be over looking?

Please help me if yall can lol

brcidd · 03-06-2009, 10:25 AM

Hearing a "fuse" is not good-- it is probably a relay that is "arcing" inside- and can't carry the current- lights that come on late and flicker and go off etc- have a bad connection in the circuit- there is poor contact somewhere- and since you can hear it- you have located the problem--that is most of the battle- so why not replace that faulty component?

I just looked at the wiring schematic for your truck- It indeed uses relays for both the DRL and Headlamp circuits- so replace the warm relay....

stock02s10 · 03-06-2009, 12:52 PM

I have replaced all of the relay fuses for all the circuits, and still not lights. What shoudl be next replacing the whole relay box under the hood?

brcidd · 03-06-2009, 01:22 PM

Now you need to test to see where the "disconnect" is - before or after the headlamp relay- so jumper 12v to the light bulb side of the relay- see if lights come on- if not, then problem is between the fuse box and the headlamps- I don't suspect headlamps-or headlamp connections- because since both are inop- then it is highly unlikely both would fail at the same time.

If lights do light- then problem is between the relay and BCM connection- or it could be the headlamp switch is not inputting proper signal to the BCM- removal of the headlamp switch and inspection of its contacts and terminals would be advised.

Have you checked the HDLP SW fuse #7 (10-amp) in the intrument panel fuse block? the one inside the cab- (on driver's side of dash I believe)

stock02s10 · 03-07-2009, 11:17 PM

My friend and I worked on the truck some today and we did everything listed we are thinking it is the switch. Ordered one today and it will be in tomorrow morning. Hopefully that is it bc I am getting impatient lol... Gota love electrical problems. Will let yall know how it works out tomorrow. Thanks

stock02s10 · 03-08-2009, 06:28 PM

Installed new switch and lights are now working. Also I have a chime now if I leave the lights on... I havent had that for about a year, so maybe thats a sign that the switch is going bad.

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