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Old 10-31-2009, 02:48 PM
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Headlight Warning Buzzer- 93 Chev S10

Hello Wise Ones of the Auto World- 'Grasshopper' has a question.

Suddenly my "Headlight Warning" (?) buzzer is inop. (93 Chev S10)
This buzzer sounds if my headlights are on, without the ignition on.
(I run with headlights during the day,
so this is very handy for one forgetful as I

Headlights, tail lights, stoplights- all continue to work fine.

If this was a Chevy feature, and not installed later, does anyone know-
where the fuse/relay is? If it's a relay- what does it look like?

Thanks in advance,

Rich

I'm new here, so if this has been covered- just point me to the link.

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Old 10-31-2009, 08:08 PM
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I seem to recall that the buzzer module gets its power from the dash lights (on my old Monza anyway) so as you turned the dash lights down the buzzer would peter out, then quit. So if you haven't already checked that one you may want to look there first.

The buzzer modules can get kicked around under the dash too, possible that it came disconnected if not in pieces. They're not the highest quality.
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Old 10-31-2009, 08:43 PM
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mine quit working in my 92 s10 as well

switches and such dont last forever, contacts wear out in them

if fuses are good and such then id say it is bad buzzer or bad lamp switch

when they quit working most ppl dont worry about it

not a big deal

would cost more money in parts to make it work again than its worth


good luck
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Old 11-01-2009, 02:20 PM
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RustyDawg- Right on! My instrument lights are ALSO inop!!!!
(didn't mention it, as I didn't think the 2 were related)
Don't know whether to be happy or not-
wasn't looking foward to replacing inst bulbs.

Guess I'll start with the buzzer mod. Where is it (usually) located,
and what does it look like?

ON the down side- the "Inst Lite" fuse checked good. Before I crawl under and check them all, could chevy have powered inst lights from a different fuse? (heaven forbid Chevy power the "headlight warn buzzer" from the. . . . headlights!)

Another thought- Anyone know the wire color code for the inst lights?
I could jumper them to see if lights & buzzer revive?

Any suggestions greatly appreciated!

Thanks again,

Rich
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Old 11-01-2009, 02:24 PM
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fast68-

Sorry to hear that. So the headlight warn buzzer is not some nice replacable module, like the turn flasher?

<mine quit working in my 92 s10 as well

switches and such dont last forever, contacts wear out in them

if fuses are good and such then id say it is bad buzzer or bad lamp switch

when they quit working most ppl dont worry about it

not a big deal

would cost more money in parts to make it work again than its worth>>
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Old 11-01-2009, 03:41 PM
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My first suspect would be the wire-wound rheostat built in to the combo headlight / park light / dimmer switch.

Play with the dash light dimmer and you may find a spot that still works. You may be able to bypass it, but you'll have to remove it to figure that out.

My experience was with a '75 Monza but knowing GM it's still the same piece in your '92 S-truck.
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Old 11-01-2009, 04:32 PM
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dunno if it would work, but radioshack sells 12v buzzers for $5.. possible it would work as a replacement... door chimes have saved me a few times from leaving the lights on
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Old 11-01-2009, 07:32 PM
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My first suspect would be the wire-wound rheostat built in to the combo headlight / park light / dimmer switch.

Yup- that's what I have. Two 'rockers' for the head/park lights.
And a 'thumbwheel' rheostat fork the Inst/dome lights.

Play with the dash light dimmer and you may find a spot that still works. You may be able to bypass it, but you'll have to remove it to figure that out.


Darn! Yea- did that- no luck. No inst lights. Just the dome lights at the end of the travel.

My experience was with a '75 Monza but knowing GM it's still the same piece in your '92 S-truck.>>>>>

It's a 93, but I think you've nailed it. Except for the EFI, the technology is probably 80s at best.

Anyone have experience, or a manual? How do I get at that switch/ rheostat ?

Thanks again for the info,

rich
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Old 11-01-2009, 07:43 PM
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Hi Matt

dunno if it would work, but radioshack sells 12v buzzers for $5.. possible it would work as a replacement... door chimes have saved me a few times from leaving the lights on

Point taken- I can rig up another headlight warning, although not instrument lights. I can't help but think that if the two are tied together, then a prime suspect is the power in. Again if it's some kind of printed board, I'm probably sol, but if it's a removable relay module . . . . I'd love to find it.

I can't believe all my inst lights would burn out together, or chevy would put inst lights on some 'impossible-to-replace' circuit board. But maybe I should

Thanks,

rich
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Old 11-02-2009, 08:13 PM
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Just sharing what I found- fwiw

It appears that the switch is worth looking into.
(still not sure how it fits into the headlight warn buzzer, but . . . .
Amazingly you can still buy the switch-

http://www.1aauto.com/1A/HeadlightSw...HS00027/256044


Question for anyone here- How do I get that switch out?
Does it pull straight out, or must the surrounding panel be removed.
If so, does that panel snap off, or are there screws somewhere?

Have a couple more local 'ole timers' to ask. Will share any info I get.

rich
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Old 11-03-2009, 05:02 PM
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Check to see if the harness is melted on the back of the switch.
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Old 11-03-2009, 05:17 PM
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How do I remove the switch?
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Old 11-04-2009, 11:06 PM
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fwiw- found the disassembly info- very straight forward.

The 'plate' that holds both the head light & instrument dimer (and FWD ctl if you have one) That plate attaches with 2 screws underneath. Remove them and the plate comes off, exposing all the switches.

As i suspected- NONE of the 4 wires going into the Inst Lite Dimmmer,
are powered, even with the head lights- ON. But the inst lite fuse checks good, as do the headlights.

Suggestions?

Also . . . Anyone have a wiring diagram, or at least the color codes,
to tell me about the 4 wires going into the inst light dimmer? < g >

rich
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Old 11-05-2009, 07:40 PM
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Well, after all that- it was a blown TAIL LIGHT fuse. Both headlight warn buzzer (actually it's a tail light warning buzzer) and the instrument lights are ok now. That tail light feed, powers a lot of stuff.


Lessons for me:
1- If ANY light is out, check ALL lights, then check ALL fuses.

2- As the S10 still has fuses under the dash- I'm shopping for a very good fuse tester- one with a wire lead. Should save a few body contortions.
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Old 11-05-2009, 07:43 PM
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One last comment- then I leave it alone-
In my 1st post, I was wrong about 'tail lights' being ok.
I had not checked carefully enough.

The headlights, turn lights & stop lights were ok,
but the TAIL lights were out.
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