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Old 12-11-2022, 11:03 AM   #1
Half Dead
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Default AU2 Wipers still not working after motor/linkage swap

Hi first time posting,
I have been living without wipers for a while, I assumed the issue was a seized linkage as when they started failing by moving super slowly at first, and eventually would just sit in the parked position kind of shuddering as the motor ticked.
I eventually found a replacement motor and linkage on ebay since my local wrecker didn't have one. Unfortunately, after installing the new part, It seems the issue remains.

I tested the plug with a multimeter (video below), with the wiper switch in the fast/high setting the wires (Colours as they are on motor side of the plug) have the following voltages:

Blue: Ticks between 1v and 0v
Green: Ticks between 12.2v and 10.8v
Black: Ground
Red: Ticks between 4v and 0v
Brown: Ground

https://youtu.be/8RaJw_bppGo

Not sure if these results are what's expected or where the problem lies, it is entirely possible that the ebay seller sent me a dud, or there's a problem elsewhere that's out of my expertise a little.
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Old 12-11-2022, 11:48 AM   #2
aussiblue
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Default Re: AU2 Wipers still not working after motor/linkage swap

Check the stalk wiring inside the column shroud at the end of the stalk are not frayed or broken. They can have similar issues to this: https://www.youtube.com/watch?v=Q13bPJn6Y1o At least new ones are still available https://www.ebay.com.au/itm/182717597081 There may also be a fault in the wiper control circuit of the body Electronic Module (BEM). See http://www.fordmods.com/ford-technic...martsheild-d35
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Last edited by aussiblue; 12-11-2022 at 12:09 PM.
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Old 12-11-2022, 12:01 PM   #3
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Default Re: AU2 Wipers still not working after motor/linkage swap

...and I think your grotty Multimeter might work better after a good clean and removal of dust in the switch etc
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Old 12-11-2022, 12:08 PM   #4
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Default Re: AU2 Wipers still not working after motor/linkage swap

Quote:
Originally Posted by aussiblue View Post
Check the stalk wiring inside the column shroud at the end of the stalk are not frayed or broken. They can have similar issues to this: https://www.youtube.com/watch?v=Q13bPJn6Y1o At least new ones are still available https://www.ebay.com.au/itm/182717597081
Thanks, I'll check it out when I have a bit of time, see if I can spot anything loose back there, I wondered if the brown wire maybe shouldn't be ground, and has come loose and earthed out somewhere, so maybe that one goes to the switch.

Quote:
Originally Posted by aussiblue View Post
...and I think your grotty Multimeter might work better after a good clean and removal of dust in the switch etc
lol yeah, the switch on it has been dicky for a while.
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Old 12-11-2022, 02:46 PM   #5
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Default Re: AU2 Wipers still not working after motor/linkage swap

Check the 'Tech Resources' area for wiring diagrams.
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Old 12-11-2022, 09:41 PM   #6
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Default Re: AU2 Wipers still not working after motor/linkage swap

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Originally Posted by GasoLane View Post
Check the 'Tech Resources' area for wiring diagrams.
The wiring diagram is a little confusing, I'm looking at 24-4-47 the one labelled "Section I-A Wiper washer system - LWB" I think that's the right one?

The wires going into the wiper motor are labelled with codes like "56 DB-Y" or "58 W-DB" I assume the letters somehow correspond with the colour of the wires, but I cant see how they'd match the actual colours on my wires.


Also I'd need the version of the combo switch with Cruise control. looks like this guy https://www.ebay.com.au/itm/141204653428 has a few different versions. Not sure what "Wiper dwell" is, is that just intermittent wipers, don't they all have that?
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Old 15-11-2022, 08:01 PM   #7
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Default Re: AU2 Wipers still not working after motor/linkage swap

OMG, so after a ton of troubleshooting;
- I pulled off the steering wheel (had to buy a set of 5-point torx bits and a steering wheel puller to do it) and took off the column switches...
- I tested the switches as best I could with my multimeter and they seemed to work as I expected and I couldn't see any obvious damage like in that Territory video.
- I tested the continuity of the wires from the plug that the column switch plugs into, right to the plug that the wiper motor plugs into... all good.

I doubted the BEM being the problem, since I wasn't having any other issues with anything else controlled by the BEM.

After doing all this, I decided to do the thing I probably should have done first; check that the new motor/linkages that I bought off ebay weren't dodgy.
I pulled off the connecting linkages with a flathead screwdriver and tried the motor on it's own... It worked just fine, turns out the driver-side wiper socket/sleeve/whatever is completely seized, which incidentally was the exact same issue I had with my original one ��

https://youtube.com/shorts/rSdGL_nVh6Q

Last edited by Half Dead; 15-11-2022 at 08:02 PM. Reason: vid link
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Old 16-11-2022, 04:10 PM   #8
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Default Re: AU2 Wipers still not working after motor/linkage swap

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