924Board.org

kewpie79 · Posted: Sun Dec 17, 2006 8:27 am Post subject: light problems

My headlights stay up, but no light. New headlights and relay, switch and motor. No brake lights, but I do have blinkers working and hazards, plus parking lights. Also, my windows don't go up and down and the blower only comes on when I adjust the mirror. What the heck is going on?
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1980 Porsche 924
1984 Pontiac Grand Prix
2003 Kia Sorento

Ozzie · Posted: Sun Dec 17, 2006 9:46 am Post subject:

Ign switch?
Wiring?
A main feed from the battery is off the relay board?
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

kewpie79 · Posted: Mon Dec 18, 2006 5:53 am Post subject:

ignition switch and both pressure switches have been replaced recently.
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1980 Porsche 924
1984 Pontiac Grand Prix
2003 Kia Sorento

Smoothie · Posted: Mon Dec 18, 2006 7:32 am Post subject:

The only thing I can see that all those things have in common is they all run through the fuse-relay board. If you've already been through the fuses and grounds, I'd say it's time to get used to the thought of having to check out the board. Once you've crawled in there and are looking up (after removing the steering wheel and maybe the seat, plus disconnecting the battery), letter the connectors A, B, C, etc. from right to left before unplugging (if you don't, you'll be wishing you did later). The single wire "G" connections also need to go back where they were unplugged from, so note where they're attached also. The "H"'s can be re-attached any way they fit. Once you have the board out (you'll have to remove some of the upper row relays to get it out - note where they are also), look for oxidized/burnt pins. They can be scraped clean with a needle file set. The corresponding female pins in the connectors can be cleaned in the same way. There's a post on the fine art of pin extraction in the How-To area if you need to replace any pins. If the board looks like it's had water leaked onto it, you'll probably want to replace it with a new one. There's also a ring of grounds up under the dash above the fuse-relay board that should be checked-cleaned.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

kewpie79 · Posted: Mon Dec 18, 2006 12:55 pm Post subject:

thanks, sounds like this is going to be a thrill.
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1980 Porsche 924
1984 Pontiac Grand Prix
2003 Kia Sorento

Ozzie · Posted: Mon Dec 18, 2006 5:10 pm Post subject:

Bi- carb soda will clean off corrosion as well.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

Soda Powder will neutralize battery acid.

It is not any good for removing normal electrical oxidation/corrosion due to exposure to the atmosphere.

Unfortunately, it also causes metal alloys to corrode. The best, safest method of corrosion removal from electrical systems is mechanical removal using sandpaper. There are spray corrosion removal chemicals but they are messy and unreliable.

This is why car fires that are extinguished with standard dry chemical fire extinguisher are usually totaled by Insurance Companies. The unknown future damage that will arise in the car's electrical system and to other alloy components of a car make taking the risk and repairing the car too high.