mb911

ok just to update everyone here is what I have and am in doing

90 c2
po removed rear tail ,harness, light bulb from clock, and manual switch

I have now put back to as stock as possible including, all the tail and mechanicals, rear engine lid harness, manual switch,

I have since tested the micro switchs, (tested good) motor (tested good),manual switch (tested good)

I have plugged everything in and tested . So far I have up function with the manual switch and no down function. I have tested the down relay in the module and functions properly if I manually activate it but will not work any other way.

I am unable to drive the car at the moment because of salt on the roads etc so I am not sure if it works automatically as of yet but I do know that if I test #5 on the switch connector to the plug with the corresponding color wire that connects to the controll module it has 5m ohms resistance again this is the down side.

so with all of that babling what does any of this mean? Experts? please help

mojorizing

You should be getting zero ohms from #5 at the rotary switch ( green/black) to #10 at the module.

It should be the same as the extending circuit - #3 at the switch (green/red) to #9 at the module.

It looks like you have an open in the circuit.

Silvertarga

If your spoiler control module is under the front seat you will also need the relay

mb911

ok so is that just simply a wire leading from thr switch to the module? meaning can just run a new wire or does it go some other device before leading to the switch and then the module?

mb911

where is the relay located? next to the cruise module under the seat as well?

mojorizing

The wire is in parallel to the "relay" module SilverTarga mentions. It would be a good location to check the continuity of this wire.. That relay module is a source of emergency signal to raise the spoiler in case the other module fails. That functionality was deemed unnecessary by Porsche and was removed from the circuit in later years.

This additional module is located under the passenger seat if I recall correctly, near the cruise control module

Silvertarga

Mojo is correct in location of relay , it is part 96461814200

mb911

cool thanks I willing to bet that would be the issue or non issue for that matter as the car has not been (above 40mph since I got it) driven to reset the system .. is the second relay worth worring about or is there a bypass rework out there somewhere?

mojorizing

Not sure about a rework of the additional module, but in the very least, the spoiler should work manually. Further check of the high resistance on the retract circuit needs to be done. At least you know the motor and gearing works, limits are working, not sure of the spoiler module until you drive the car...

mb911

interesting enough I removed the clock(resolder) and now I dont see the same resistance values though I could have moved the broken wire at the same time? who knows but I am hoping that I will get the car out next week if we get a good rain to clean off the salt and try it out.

mb911

ok update drove the car for the first time since I bought it. resoldered a bunch of cold solder joints and it rasies by itself but will not lower by iteself or with the switch so it looks like the module is the issue. now anyone know what a rebuilt one costs or any rennlisters got some insight for DIY?

mojorizing

Ben,
Are you still able to retract the spoiler by manually pushing in the relay on the module?

Also, I see from your first post that you checked both limits, but I'm not sure how.....
Do this: put the spoiler midway open so that neither limit is met. Pull module from connector and use your VOM set to resistance and measure from #10 to #5, and #9 to #5 in the female plug. You should read a high or open on both readings, verifying that the retract limit is not met. If a reading is low, than the limit is stuck closed, defeating that direction.

I want to be sure it's not simply your retract limit blocking the closing of the spoiler, because that has been the source for many.

What is the part number of your module? I have mine out of the car and can compare resistances of components in circuit to narrow down a fault BC337 or relay coil, etc.

mojorizing

If you have a 12vdc power source and jumpers, DIY is here

https://rennlist.com/forums/3704925-post15.html

PM Springer3 and see if he can help you out, either with a known good but used unit or repairing it. As a last resort you can send the module to me and I'll test/ fix it - no charge, as per usual.

mb911

Thanks I will check it out right now the car is dead i drove it sunday and it died on me so troubleshooting that first. Not good but it looks like fuel related

mb911

ok gonna check this out is the 92 the same basically as the 90 setup? I assume so. I did figure my car out and it is running again it had a bad coil so back on topic