It’s brown not red, ground..
T6/T6.1 operate front wipers with ignition off
- Thread starter mod_man
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If its not a silly question, why are you trying to do what you are doing? I.e. run the wipers with the ign. off.
I'd be more interested in finding a way to stop the wipers wiping when you use the washers, I hate auto wipe.
That is the holy grail..
Do you have any photos of the inside of the BCM? Would be interested to see, just out of curiosity.Hi all, after much probing, debugging, etc, I'm pretty sure I've worked out where the fault with my front wipers. It appears the BCM is unable to output 12V on T73a/71 or /69 (fast or slow wipe). I suspect there is an issue with a blown FET or something in the BCM. There is no issue with the stalk or the fuses.
I've opened up the BCM, and have inspected the outputs on T73a/71 and /69. They are definitely relay selected (OMRON G8NB-17SR), and as such I'm doubtful the wipers are controlled by PWM. Also I can energise T73a/71 and 69 with the loom unplugged and get the wipers to move.
How I suspect I damaged the device was by trying to apply 12V to the wipers directly with a battery - which turned out to be flat. It was only slightly activating the wipers, and potentially creating a problem on the BCM. I may have also had a dodgy ground which could have been creating problems.
Anyways, unless someone on the site has a schematic of the BCM circuit board, I'm probably off to the wreckers to get a new BCM.
Moral of the story: Use a proper vehicle tester probe to energise circuits on the T6, rather than my ghetto battery circuit. Probably also don't let electronics engineers without much vehicle experience near your own vehicle!
same here, nothing worse in Autumn when the roads a greasy & its drizzling, trying to clean the screen & the wipers have cleared the wash liquid before its had chance to do anything.
I've only just seen this tread and I'm sorry to hear of your problems.
The only way I can see to do what you want is to add a relay onto each wire going to the wiper. You'll only need to do this on the power feed and slow speed power feed.
The relays need to be connected so they are energised when the ignition is on, which then makes the connection from the wipers to the BCM. When the ignition is off, the relay can switch to connect the wipers direct to the battery via a swith.
I've still no idea why you need to do this. Switching on the ignition and turning on the wipers isn't hard.
The only way I can see to do what you want is to add a relay onto each wire going to the wiper. You'll only need to do this on the power feed and slow speed power feed.
The relays need to be connected so they are energised when the ignition is on, which then makes the connection from the wipers to the BCM. When the ignition is off, the relay can switch to connect the wipers direct to the battery via a swith.
I've still no idea why you need to do this. Switching on the ignition and turning on the wipers isn't hard.
Great idea using the relay.
I'm a wildlife photographer, need a remote switch in the back to quickly flick the front wipers if needed.
I'm sure I'm not the only one who has been pondering this for weeks, trying to think what your use-case was
How did you achieve this?
I bet lots of people would be interested in that. T6.1 is the same and it really bugs me. Video doesn’t tell us the solution
Be careful what you wish for.
My XC70(s) had a permanent supply to the wipers to do this but the rear wiper is (in)famous for jamming up on these (that's what happens when you design the rear wash pipe to go through the middle of the wiper gearbox axle) so if you missed that the wiper had got locked up again when you parked you came back to a low battery as the wiper drew around 6A locked.
My XC70(s) had a permanent supply to the wipers to do this but the rear wiper is (in)famous for jamming up on these (that's what happens when you design the rear wash pipe to go through the middle of the wiper gearbox axle) so if you missed that the wiper had got locked up again when you parked you came back to a low battery as the wiper drew around 6A locked.
Coding adjustment.
The video demonstrates the final resultI bet lots of people would be interested in that. T6.1 is the same and it really bugs me. Video doesn’t tell us the solution
and wipers getting stopped in random upward position also bugged me since day number one.
Thankfully VW designed windscreen wipers to be fed directly by the BCM. I still can't figure out why their default setting is different for Transporter vs other models/electronic platforms
So... Any chance we might convince you to tell us the coding adjustments needed? Or perhaps they can be found in the appropriate document on the download section I've yet to explore?
Thank you so much! Gotta find time to hook up the old VCDS now...
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