nine9six

I have a 3 lb sledge, will that help?

Or you could ease the problem relay apart and check for any problematic cracked solder joints, and reflow them.

your choice.

nine9six

I have a 3 lb sledge, will that help?

Or you could ease the problem relay apart and check for any problematic cracked solder joints, and reflow them.

your choice. PLEASE DELETE DUPLICATE POST

nile13

I'm just thinking of what could cause the relay to get stuck (not problem with that part) and then unstuck when the lights are turned off completely (that part puzzles me).

Have to fish out schematics and look at it. I have one somewhere.

JPS

I'll check the relay next week when I'm back at the car. Any thoughts on why it would get stuck I welcome...

Thx.

nile13

Oh, that's easy. Same reason DME relays fail. They just do. Because it's a German relay likely made by VDO or some other incapable company. They just can't make electrical components, nor can they solder. I don't think any of us own these cars for their reliability

JPS

So I finally got around to this. The fuse diagram shows 2 different relays for fog, perhaps one is US only or something. In any case I took the sunroof relay and sequentially tried switching out both of them. Still does it. Aftermarket Tequipment fogs as part of the front brake ducts.

Thoughts?

JPS

Thoughts?

JPS

So I swapped both relays (one at at time of course) for both the US and the presumably non-US, with the working one from the sunroof. Still turns off and stays off until I either replace the relay again, or turn the switch on and off.

Any thoughts?

JPS

Resurrecting this. I just lived with it for awhile and put it on my list of things to attend to. But I've had the car in the shop for unrelated issues and asked them to look at it.

They so far can't figure it out but said it might be the steering column switch. But it is $500 and no guarantee that it will work. So, PRETTY PLEASE OH RENNLIST GURUs...any thoughts?

To recap and clarify:

Techart fogs installed in turbo ducts. When I turn them on through dashboard switch, they correctly come on. When I turn on my high beams on the headlights, the fogs correctly go off. When I then turn the high beams off, the fogs INCORRECTLY stay off. If I turn off the switch and turn it back on (for the fogs), they come on and stay on until high beams, then off again.

I tried swapping the relay with the working sunroof relay.

The shop looked for a hidden second relay somewhere...didn't find one.

Any thoughts? Is the aforementioned switch something easily swappable? Perhaps I could borrow one from someone.

Thanks,

hoggel

There are two foglight relays, R31 and R34.

R31 should be energized when the Foglight Switch and the Light Switches are on. I think if this relay was not working correctly on your car the fog lights would not come on.

R34 controls the fog lights depending on the position of the high/low beam switch. I can't tell from the fuzzy diagram I have in front of me if that relay is normally open or closed. But I can see that pin 7 of that relay should have 12v when the high beams are on. That should de-energize that relay and turn off the fog lights. When that is removed the relay should energize again and turn the fogs back on. It looks like the ground path for that relay is through the high beam bulbs. Have you modified your high beam bulbs?

TJ993

WISH I could add But just mentioning DRL
Canadians have to Modify and I guess or think add a Relay to legalize.
Daytime run Lights are Mandatory.

So point is depending on who or where the car was registered prior to your ownership, perhaps DRL was added? (Yes I read your mechanic did not see anything- But just saying)
TJ

JPS

Yes. I have Tore's high beams.

hoggel

If your high beams are hid the ballast may not carry enough current to allow the relay to engage again after the high beams are switched off.

Try connecting a 12v incandescent test lamp between one of the high beam fuses and ground then see if the fogs work correctly.

JPS

So what would be the fix?

hoggel

If the high beam bulbs are causing the problem you could go back to incandescent bulbs or you could add a pull down circuit to the relay.