I got my dash lights to work a few days ago! Yes!!!

I now have to figure out which pins in the back of the HVAC control module go where. There are about six of them I believe. I don't think I have them in the right places as when I turn the round fan ****, it does nothing. When I put the switch on from side to side, it seems to just stay on high.

I also don't think I have the vacuum lines behind it going to the right places as the metal tree which they plug into can get hot.

Speedometer is not working at all

My other mystery is that I am not sure which wires go to the clock.

My ABS warning light stays on all the time. I have to work that out.

One more thing is that my stop lamp will go on when I start the car, but will go off as soon as I hit the brakes? No bulbs are out. I replaced them all for the heck of it.

A/C compressor is in place, but looks like it has not been working in years. Belt has been removed by first owner. I want to address that at some point too. Anyone rebuild these? Alternative recommendations are welcomed. I would love to drive the car with the A/C going at some point, but I guess I am getting ahead of myself.

Gettin there...

 

Have you done a search for "Blower" and "ABS"? There is a lot of info already on the board for both of these issues.

The vacuum lines are color coded


If you've had the instrument cluster out to work on the dash lights I would start there looking for wire issues relating to the speedometer. If there are no problems there, look at the speed sensor wiring coming from the differential. The impulse sender for the speedometer is mounted in the diff cover.

The "Stop Lamp" light behavior is as designed .

 

I have done a search. Was looking for an actual illustration to simplify things a bit. I will check the diff wiring. Thanks. My car never came with a manual...

 

Find one of Andrew Olsen's (user=AO) posts. He has a link to all the 928 owners manuals posted online. If you want a hard copy 928 Intl has them for $25 IIRC.

Try searching for "Magic Blower" and "ABS Fault." The Rennlist search function is the source of much consternation. Put your search terms in quotes for better results.

Mike

 

Did you get an owners manual yet? If not, pm me with the year of your car and your email, I might have it electronically.
I thought I had pm you regarding this before.

 

Thanks Bilal,
1987 S4
MonroeHandyMan@aol.com

 

Thanks Mike,
I did previously look up "Magic Blower", but that does not seem to fit the description as my problem is not random. I think when I had to pull the HVAC pins out to remove my center console, I did not put them back in the correct order, same goes for the vacuum lines. It would simplify things to see actual pics if possible as that above diagram is not my cup of tea...

 

Going to share some Google docs with you:928OCLI@gmail.com

 

Thanks Mike

 

Hard to follow this. There are two plugs on the left side of the controller. If you move the function slider to "defrost" the fan runs on high with full heat, bypassing the resistor pack. You need to get the workshop manual set on CD from Jim Morehouse (email link in a post in the new visitor guide pinned at the top of the forum). It will have the wiring diagrams for your car.

Your fire may have gotten to these lines that run through the dash. The solenoid gang is a bit hard to remove behind the radio. Hopefully you have found instructions on testing and repairing this by either Dwayne or John Pirtle.

The sensor is on the back of the diff and the wiring goes up through area above the battery box to a harness connector hidden behind a plastic panel in front of the spare tire, then on to the CE panel and to the instrument panel. Maybe another victim of your fire or could be simply disconnected back in the well area. The sensor rarely fails.

The clock has a brown ground wire, 2 black/blue wires on another post and a red power wire. Again, get the WSM from Morehouse.

That is normal operation.

You can buy rebuilt Nippondenso 6e171 units from a variety of places from $100 on up. Quality and how long they last matches price. But you need to figure out if that is needed and/or something else is wrong. Look for Wally Plumley's AC guide to start.

 

Thanks Bill,
I pulled the console out completely to re-wire the harness. Nothing in the center console was touched by the fire at all with the exception of the plastic vent which I replaced. I thoroughly inspected everything. Everything the minor fire touched has been replaced as it only hit the wiring harness in the passenger footwell, tranny vacuum line under the car and the passenger side floormat. I was lucky to be right there with the hose to put the "Cat fire" out instantly. This is just a matter of putting these things back correctly as I pulled them out to remove the console. They sure don't give you much wiggle room...

 

Can you post a pic of the HVAC wires you are wondering about?


-don