924Board.org

[MikesCoupeGT]

So I am slowly making my way through the 924. I have all the lights working, drivers seat installed, handbrake cable is still snagged on something. But the one thing I need is to get the wipers working for the safety check.

I have checked the fuse (#11) it looks good, but will replace it.
I have cleaned up the connections on the plugs with contact cleaner and still nothing.
I have gone through my shop manual and it does not look to have a relay that makes them work. Could I be looking at a bad motor???

76-924, when you had the car did the wipers work?

Any help is much appreciated.
_________________
Cheers;
MikesCoupeGT
'76 924
'83 944
''19 Elantra GT N-Line

[Smoothie]

Have a look here at the links I gave and at Ozzie's good info -
http://www.924board.org/viewtopic.php?t=24413

There is a wiper relay, but it only controls the intermittant wipe function and wiper "parking" (making them stop at the bottom after shutoff). You could pull it anyway to see if it's affecting the operation. Wipers will work with the relay removed, assuming there isn't a problem elsewhere.

When I had trouble with mine, it was burnt connection/s on the fuse-relay panel causing intermittant or no wiping at all. I could usually get them working by wiggling the wires behind the panel until the day I finally removed the panel and scraped clean the connectors.
_________________
"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

[ideola]

You should be able to check if the motor is good by identifying which leads correspond to ground and 12v+, and then testing the motor by briefly connecting directly to the battery.

If the harness, motor, and fuses all check out, it is most likely that the wiper switch assembly itself has gone bad. The assemblies are mostly plastic and they do crack / disintegrate, causing the electrical contacts to fail to close the circuit.

There are some posts here on the board about the two different styles of switch assemblies (one is held in by 3 screws, the other by 4). I don't have a bookmark to them handy, but if you do some searching you might find some more detailed instructions for how to check and repair the switch assembly.

Are you familiar with how to remove the switch assembly from the steering column?
_________________
erstwhile owner of just about every 924 variant ever made

[MikesCoupeGT]

Ideola, I will have to say, that I do not have the slightest idea on how to check the switch assembly. Never had to before. I would have to check the repair manual I have.

i have gone through the links you noted smoothie. I will have to go through this on the weekend.

Thanks folks I appreciate the assist.
_________________
Cheers;
MikesCoupeGT
'76 924
'83 944
''19 Elantra GT N-Line

[ideola]

To get you started:

• Center the steering wheel
  
• Pull the horn cover off the steering wheel (careful not to punch yourself in the nose in the process!)
  
• Using a 24mm socket, remove the steering wheel nut, then remove gently pull the steering wheel forward
  
• You should now be able to see the 3 or 4 aforementioned screws that hold the wiper switch assembly in place.
  
• Before removing those screws, unplug the two harness from under the dash. One harness is for the turn signal switch, and the other is for the wiper assembly. Be careful, these can be really fragile too.
  
• Now remove the 3 or 4 screws (should be a narrow blade flat head)
  
• The wiper and turn signal switch assembly (two assemblies) should come out together

This is the writeup I was thinking about:
Fixing the windshield washer activation switches.
While it focuses on the windshield washer circuit, I think there may be some helpful details there about the switch assembly.
_________________
erstwhile owner of just about every 924 variant ever made

[Ozzie]

I'd pull the motor out and test it on the bench.
As said before find which wires are the + and - and hook up a battery.
If the motor works half the battle is one.

The controls and wires would be next to look at if the motor is ok.
Relay is only used for intermittent and parking the motor when turned off.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

[Paul]

Smoothies link (welcome back!) has a picture that shows how to test it....

http://www.flickr.com/photos/9754161@N02/738912725/in/set-72157600685477122/
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[MikesCoupeGT]

Hey guys so I took the time and my handy dandy multi-meter and tested the connections at the wiper motor. When the switch is on in all three selections, intermittent, slow and fast, I get a good flow of power to the connector, some where in the 12 to 13 range. (it showed green on the meter)

So I am hoping that this indicates that the wires are good up to where it connects to the motor. Next steps for me are to clean the connectors on the motor and find some small cables to test the motor by jumping it from the battery as Ideola and others have suggested.

I really am hoping that it is just dirty connections. If it is the motor, can a 944 motor work? I might be able to get my hands on a good one.
_________________
Cheers;
MikesCoupeGT
'76 924
'83 944
''19 Elantra GT N-Line

[Paul]

Test again with a 12V test light, you need to verify that you have volts and amps.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.