924Board.org

[cgalyon]

After reading over the schematics and determining that the problem likely resides in the switch between high/low beams I removed the steering wheel, pulled out the switch and examined the wiring. I discovered that where the schematic shows that there should be ~9 wires, the actual switch consists of 7 (in a nice little plug at least). My schematic was from a 1987 924S, however, as I couldn't find it for the 1988 model. I thought they would be the same, but either they're not or there is some misinterpretation (likely on my part). I took several pictures, which I'll link below. I had some difficulty getting the lighting right, however, to accurately show the wire colors, especially for the green/black/white wire.

So does anyone know a) if the wiring differs between the years (for US models) and if so have an image of the switch schematic for the 1988 model, and b) know which wires correspond to the yellow ("GE" or "Gelb") and blue/white ("BL/WS" or "Blau/Weiss") wires? Thanks!








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1988 924S Navy Blue - Phone Dials

[edredas]

Hey, my '87 looks exactly the same as your car. The photos you posted are just the 7 wires for the turn signals. The high/low beam switch is actually attached to the left hand side of the wiper control. You'll have to pull it off steering column to see the rest of it, and it's wiring hiding in the dash. As far as I can tell, that schematic is pretty accurate for both our cars.
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'84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver

[cgalyon]

Ok thanks, I'll give that a try tomorrow (assuming I can get enough daylight)! Didn't realize it would be underneath more stuff, just gotta keep digging I suppose.
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1988 924S Navy Blue - Phone Dials

[cgalyon]

Alright I pulled the wiper switch, found the wires I was looking for and meddled with the switch assembly for a bit. The good news is that if I pull back the switch then the lights come on like they should (still no low beams, but that might be another issue). The bad news is that the switch assembly appears to be broken and incapable of remaining on once re-assembled. Examining the switch further I found a crack in the plastic. I'm guessing my current switch needs to be replaced and the replacement part from Pelican is about $105.

So does anyone have a spare wiper switch assembly they'd be willing to part with for less than Pelican?

Pictures:

Cracked


Larger part image
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1988 924S Navy Blue - Phone Dials

[John_AZ]

George at www.944ecology.com parts cars or post it on PP "parts needed" if you do not get a 924Board member response.
http://forums.pelicanparts.com/forumdisplay.php?f=19

Nice pictures

GL
John_AZ
1988 924S + 1987 924S

[gohim]

I might have one.

I can look for it tomorrow when it warms up.

[mehall]

Good to have pics.

I am having problems in the same physical area. I was looking at the, wiper switch photo, and I notice that mine seems to be missing something, which might explain my lack of turn signals.

In the right side of the switch part, there is a spring with a copper washer retainer. It's kind of dark in his photo, but if anyone can expalin it's role, if any, in the circuit?

When I first took apart my switches, that spring was there. I was somewhat taken aback when it suddenly let go and flew off to God know's where! The wipers work fine, dimmer is fine, but I have no turn signals.

I can find no method by which that spring/washer could make contact with anything. Would this spring be a possible culprit? or is that there to hold contact pressure on the wiper switch?
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[edredas]

Mehall, the spring with retainer on the wiper control has no role in the turn signal circuit. It's in control of returning the wiper handle when it is pulled back to turn on the windshield washers. Not having it should cause no problems other than the washers not turning off by themselves. What kind of symptoms do you have? I had no turn signals but, the green indicator light was still coming on. It just turned out to be a dirty contact in the fuse box.
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'84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver

[mehall]

I have the green light constantly on, nothing happens when I move the switch. If I turn on the 4-ways, the green light goes out, but still no flashing. The "running" lights work fine.

They worked perfectly until I took apart the switches, and following some (perhaps bad) advice, I sprayed everything with contact cleaner and then covered the contacts with dielectric grease.

We did play around in the fuse box, replacing 2 bad fuses (that had been woefully under fused!) I have little confidence in the PO's mechanical accumen.

Thank you so much for explaining that spring. That was the only real use I could see, but this is a German part - and I guess I can be a bit gullible about what they might do.

Mark
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

[edredas]

Mark, I was thinking about cleaning my switches as well, but after studying them awhile... I thought better of it. Though, I'm glad someone was brave enough to try ! From what you've mentioned, I'll agree that it sounds like your switches are the problem. An easy way you can test this is by unplugging the wires going to the turn signals, then flipping on the 4-ways. If your flashers start behaving properly, you can be fairly certain the problem lies within your switches.

If by unplugging the turn signals you see no results, I would check for a bad ground connection before I started buying any parts. Bad grounds have accounted for 99.9% of all of the electrical problems I've encountered. While, it's entirely possible that you have a bad relay... I can't be certain since I've (yet) to experience a relay failure on my 924. So, maybe someone else around here may know how to diagnose it better than I.

If it does turn out to be your switch, it's probably just because of some slight mis-assembly. I would be glad to show you photos of how it should be assembled, if thats the route you decide to take. But, if you just don't want to bother with dissembling it again, someone might be able to fix it cheaper than buying a new one.

Also, if you're interested, I believe that I saw one of the spare springs and washers that you're missing, laying around my shop today. After all, there's nothing wrong with being a bit "gullible" when it comes to German cars. Especially, the 924.
_________________
'84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver