964 Rear Spoiler

[viking66]

Folks,

Got the car out on the road again as most of the snow have melted here, when I reconnected the battery after the winter lay up the rear spoiler came up as to greet me. Didn't think much of it at the time but when I park the car overnight (with the spoiler down) the spoiler is up in the morning, moves as normal when driving.

Not much an inconvenience but obviously electricity is going where it's not supposed to hence wonder if anyone else have had this experience before i put on my thinking hat and try to figure this out.

Thanks in adv,

[klober23]

I would start simple and check the spoiler switch / control knob. The one you use to manually put the spoiler up / down.

[viking66]

Thanks found below on renn list which was helpful, my control unit is toast. The spoiler stopped working completely shortly after my initial post.

What seem to have caused the initial problem was that one of the micro switches had vibrated losse hanging the on last thread and did not make proper contact.

qte

Pinout for controller, 1992 version:

1 No connect
2 No connect
3 Spoiler moter terminal 2
4 Spoiler moter terminal 1
5 Earth/Ground
6 +12 through 15 amp fuse, always on
7 +12 from J25, switched (7.5 amp fuse)
8 F57 on central informer
9 Terminal 3 "extend" on manual switch, "spoiler up" limit switch
10 Terminal 5 "retract" on manual switch, "spoiler down" limit switch
11 Common on manual switch
12 G56 - speed signal
13 No connect
14 No connect

To check the motor, wires, and limit switches from the controller plug:

Limit switches and wiring:
Spoiler down, 9 - 11 open, 10 - 11 closed
Spoiler up, 9 - 11 closed, 10 - 11 open
Spoiler mid position - 9 - 11 and 10 - 11 open

Motor and wiring:
CAUTION: you will damage the motor or the mechanism if you drive past "full up" or "full down"
Put +12 and neg on 3 - 4. Polarity determines motor direction.


To check controller operation on work bench:

Put fused 12 volt power on 6 and 7, neg/ground on pin 5
If either relay operates, replace the driver transistor

Jumper pin 3 to pin 11, the "extend" relay should operate. Jumper pin 9 to pin 11, and the relay should drop out.

Jumper pin 10 to pin 11, the "retract" relay should operate. Jumper pin 10 to pin 11, and the relay should drop out.

If you have a function generator, you can put a pulse signal on pin 12 and simulate the auto-extend and auto-retract.
__________________
1992 White/Tan C2

un qte

[dleefso]

Hi - Can we backup to where the main components are for the spoiler, like where the controller is and other things to check? I think mine is just a connection as it was just behaving 'randomly' (going up and down) and now it's stuck up (I guess like many fine ladies)!

[greg1990964]

Lets bring this thread alive! I need answers!

[lbpa18]

Bump