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Old 08-06-2007, 08:01 AM
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head light problem

to make a long story short, reached under dash on my 70 El Camino to adjust speaker, moved harness out of the way to reach speaker. Noticed no head lights. replaced switch assembly. I have running, and tail lights but no head lights. going to attack this after work today, need all the expert help that you can give me.

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Old 08-06-2007, 04:14 PM
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Check the (I think it is Yellow) wire from the switch to the dimmer switch.

With the HL sw in the 'on' position---you should have 12vdc to the center wire on the floor dimmer.

If not---perhaps that wire pulled loose from the HL switch connector.
not all that uncommon.

If it has pulled from the connector----try to completely remove it (noting the position and orientation in the connector) and bend the tiny tab on the back of the terminal out a little bit. This is the locking tab, and should lock the terminal in place if the connector is not damaged.

If you have voltage at the dimmer switch, but no voltage on either of the outboard terminals----dimmer is bad.

Be a good idea to replace it anyway-----I had one of these monsters start a fire on my floorboards as I was clipping across Calif Hiway 58 @ 75mph, on a very dark night (2am).
Instant lights out!!!!-----FIRE

75mph in the dark----with a fire on the floor------NOT FUNNY

Bryan
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Old 08-06-2007, 06:00 PM
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Headlight

Don't forget to check the headlight fuse, it's not the same as the marker/tailght fuse. Something may have shorted when you moved the wires around. If it is blown I'd check to see what shorted to burn it out.
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Old 08-07-2007, 11:29 AM
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head light problem

thank you both, I will check out your suggestions when I get off work today.
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Old 08-07-2007, 02:50 PM
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be sure to check the lamps as well, you will feel pretty silly if you spend hours on it and find out the lights are no good.

We have all dont something similar at some point.
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Old 08-07-2007, 04:21 PM
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Quote:
Originally Posted by ernkazern
Don't forget to check the headlight fuse, it's not the same as the marker/tailght fuse. Something may have shorted when you moved the wires around. If it is blown I'd check to see what shorted to burn it out.

Doc here,

RARELY do automotive manufactures use a "Headlight Fuse" at all..

The preferred method is a Thermal Reset INSIDE the Lamp switch..it senses over current by heat, trips until cool (unless catastrophic short) then resets.

SOME headlamp systems That use RELAYS , will employ a H/L fuse..this is actually the fuse for the relay coil..the actual power comes from the battery, Via a fuse link, to the N.O. set of contacts on the relay...Then the C.W. Contact when energized carries power to the lamps..

Don't forget to check the front end grounds..without those , the lamps wont work either..clamp a jump start cable to the battery , then to ground at the radiator support near the lamps to check..


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Old 08-07-2007, 06:16 PM
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Haedlights

Oops, that's what I get for not having the specific wiring diagram.
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Old 08-08-2007, 07:21 AM
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head light problem

Thank you all for the helpful advise, todays winner goes to Bryan. It was the dimmer switch. When wiggled it would work, so for $9 problem solved. Again thank you all this is a great resource to trouble shoot any problem. I know I will be talking to you all again. Thank you from Seattle. (Bryan, if you are in Seattle or I am in Texas, I owe you a dinner.)
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Old 08-08-2007, 07:40 PM
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Quote:
Originally Posted by mike martinson
Thank you all for the helpful advise, todays winner goes to Bryan. It was the dimmer switch. When wiggled it would work, so for $9 problem solved. Again thank you all this is a great resource to trouble shoot any problem. I know I will be talking to you all again. Thank you from Seattle. (Bryan, if you are in Seattle or I am in Texas, I owe you a dinner.)

Doc here,

That's what EVERYBODY is here for..

If one answer doesn't get it..another probably will..and in record time (because of a lot of reads..)

BTW..while your at it...Scan and Email some "Prime Rib" and plank fries...but watch out for the Au Ju..It drips all over the computer..and also gums up the mailbox..

Good to hear you got the help you needed..

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Old 08-11-2007, 05:58 PM
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I'm actually kind of fond of the Alaskan King Crab from the Crab Pot
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Old 08-12-2007, 07:17 AM
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head light problem

now your talking, thank you so much for sharing your miss fortune and making it a success story for me. Just got back from a car show, I was not in it but just drove the car around. Looks like I might have the old girl sold. If this happens I will be looking for another project. Any suggestions?
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