Hi Folks,
Is there anybody here with intimate knowledge of the Mk4 rear wiper circuit?
I'm having an issue with mine that seems strange, and I can't quite figure it out.
I think the only thing left that I have not done is bench test the rear wiper motor (Which is a brand new aftermarket unit).
It is a bit of a long story, but I'll give you the current details to see if it makes any sense:
When I switch the rear wiper to ON, it works as it should, but when I switch it off it keeps on running (normally) forever.
If I pull back on the switch to activate the front wiper wash, the rear wiper will stop.
This made it seem like a bad switch/stalk, so I swapped it with another one, and the same problem.
I completely removed the switch/stalk from the steering column, and the problem is still there with the contacts jumped.
If I jump ground to wire #97, it gives the rear wiper board the input to run. Remove jumper, and the wiper motor stays latched on.
The only way to stop it is to switch 12vdc+ on to wire #97, or turn the ignition off.
The only other thing that wire #97 touches is the J31/377 wiper relay, so I removed it too.
Now, with the front wiper relay removed, the rear wiper will start and run as normal, but when you open the contact to stop it, the wiper motor goes into the rear wash cycle before it stops. It did it 3 out of 4 times I tested it.
Does that sound like the rear wiper motor/board is faulty? It is brand new, but it could still be bad.
If not, does anybody have any tips on what else I could check?
I replaced the wires/grommet between the body and hatch two years ago, so I assume they are OK, but I have not checked them since.
Any suggestions at all would be appreciated.
Thanks,
Rem
Is there anybody here with intimate knowledge of the Mk4 rear wiper circuit?
I'm having an issue with mine that seems strange, and I can't quite figure it out.
I think the only thing left that I have not done is bench test the rear wiper motor (Which is a brand new aftermarket unit).
It is a bit of a long story, but I'll give you the current details to see if it makes any sense:
When I switch the rear wiper to ON, it works as it should, but when I switch it off it keeps on running (normally) forever.
If I pull back on the switch to activate the front wiper wash, the rear wiper will stop.
This made it seem like a bad switch/stalk, so I swapped it with another one, and the same problem.
I completely removed the switch/stalk from the steering column, and the problem is still there with the contacts jumped.
If I jump ground to wire #97, it gives the rear wiper board the input to run. Remove jumper, and the wiper motor stays latched on.
The only way to stop it is to switch 12vdc+ on to wire #97, or turn the ignition off.
The only other thing that wire #97 touches is the J31/377 wiper relay, so I removed it too.
Now, with the front wiper relay removed, the rear wiper will start and run as normal, but when you open the contact to stop it, the wiper motor goes into the rear wash cycle before it stops. It did it 3 out of 4 times I tested it.
Does that sound like the rear wiper motor/board is faulty? It is brand new, but it could still be bad.
If not, does anybody have any tips on what else I could check?
I replaced the wires/grommet between the body and hatch two years ago, so I assume they are OK, but I have not checked them since.
Any suggestions at all would be appreciated.
Thanks,
Rem
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