rear window and wiper stopped working

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Pitkin2020

Member
Posts
34
Location
Barnstaple
Hey all, Ive searched and read loads of threads but no real solution to the problem has come up, yet it appears to be a fairly common fault.

Basically the rear wipe/wash and window have stopped working. If i do the battery reset the window goes all the way down upon reconnection, the console switch will then operate the window up and down without issue, however as soon as i press the rear wiper nothing happens, window no longer functions and the wiper doesnt work either.
ive removed the wiper motor, checked the little micro switches on the motor and they both appear to be clicking in and out fine so im stumped. Is there a bypass that can be done? or further checks on the microswitches?
 
I e also checked continuity from inside the rear quarter panel plugs to the wiper motor plugs and all is good so I don't believe it's a break in the door.loom
 
If the window is dropping to open, and going up when closed, then the CCU knows the window is up.
Does the boot light go out when the boot is closed?
 
Ok reinstated the boot light here's what happens.

Open the boot, all Interior lights come on, close boot 5-10 seconds later all interior lights go out including the boot ‍♂️
 
Pitkin2020 said:
Ok reinstated the boot light here's what happens.

Open the boot, all Interior lights come on, close boot 5-10 seconds later all interior lights go out including the boot ‍♂️
Click to expand...

That's correct. All the lights are on the same circuit, so all come on together.

I was needing to know if the CCU was aware the boot door was closed, which it does, as the interior lights got out.

I'm thinking the issue is likely to be with the rear wiper switch, at least it needs elimination before delving deeper into potential CCU issues.
 
We talking about the little microswitches under the black plastic cover on the wiper motor itself? Or there some other switch?

I'm trying to get another wiper motor to see if that will resolve it.

I did think with the wiper motor unplugged the window would operate but it doesn't, it obviously needs the wiper motor in place for signal I'm assuming?
 
The CCU prevents window operation if it thinks that the wiper is working. It may be the wiper parking switch inside the motor that is sending the wrong signal back to the CCU.

Not sure where the park switch is but sounds like the wiper motor and switches is the place to look. Similarly you can't turn the wiper on if the window is open, for obvious reasons, there is a hall effect sensor in the window motor to tell the CCU where the window is.
 
I did get someone to press what looks like the parked microswitch on the wiper motor whilst I tried to operate the window but still no luck. That's not to say the microswitch itself isn't knackered
 
I'm not sure which pins on the plug to bridge to make it parked that's the problem, I've held the microswitch in but that didn't help but could be the microswitches at fault.

I've removed the wiper motor and ran the motor off a battery so the motor itself hasn't failed
 
On the circuit, the connector on the motor has a centre contact on pin 5 which connects to pin 3 or 4 depending on whether the motor is running or parked. Diagram doesn't show which but if you can check that you have connection from say 5 to 4 then when you put motor on it changes from 5 to 3 or the other way around you will have tested the park switch.
 
The motor for the wiper isn't activating upon pressing the button for the rear wiper and you can't get to the terminals with it plugged in.
However if I was to bridge 5 to 4 or 5 to 3 and the window doesn't work that would indicate that the window motor isn't sending the signal it's shut.....or am I way off ‍♂️
 
Just checked the microswitches on the motor
Basically I have 5 pins (3 top row, 2 bottom row)
Top left I'll call 1-3 bottom left 4-5
1 Brown - goes wiper motor power
2 black -goes to wiper motor power
3 yellow
4 green
5 white

I think the park position is green and white 4&5 (continuity when pressing the microswitch)
And top of the wiper motor is yellow and white 3&5

I can't see why the window won't work fully if the 4&5 are bridged as it should see it as the motor is parked?
 
I'd be checking continuity 4 and 5 when pressed which you have done and 3 and 5 when not pressed.

Check which pair make connection when motor is running and the other pair will be the park contacts that tell the ccu the wiper is parked.
Those terminals then can be bridged on the door loom to send a parked back to the ccu. See if window is happy then!!
 
I bridged the park terminals, window went down but wouldn't go back up again.
It also locked up when when pressing the wiper button but I assume that's because it's looking for top of the wiper signal followed by the park signal again which it wouldn't have received
 
Ok so put new wiper motor in today, it's definitely in the parked position. Did battery reset, wi Dow went up and down fine several times, operated the wiper and it locks up again, nothing from the wiper and the window now inoperable.

Again battery reset, removed wiper motor and bridged the parked contacts, window will go down but not up.

Checked the black wire back to the quarter panel and continuity is all good, I'm stumped now

As a side note if I hold the window button all the way up or down it goes all the way up or all the way down, however if I only bring the window half way up and let go of the button it takes it self back down again, is that correct?
 
Last edited:
It could be a broken or intermittent cable to the door. If you remove the drivers side rear inner panel in the boot you'll find a connector where you can unplug the boot door wiring to let you ring out the cables
 
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