Wipers

[Rightthen]

Does the mechanism definitely move? Did you test the motor before refitting to the mechanism?

Mech is definitely greased and sweet. I haven't refit it yet because it wasn't moving.

It's a puzzle alright

[Rightthen]

Put the motor on the mech, but didn't put it on the car. Didn't seem much point till it's going. I did take it off just to check, but that was daft as I'd already checked the movement. Just had to be sure lol

[Rightthen]

I know the earth and live are correct, so the other 3 would just make it go at the wrong speeds if they were off, surely?

I just remembered that there are only 4 wires coming to the connector from the car side. I noticed the other day. Could that be the issue? Has one maybe been pulled into the sleeve?? I can't really see how that would happen

[Rightthen]

Also, it died gradually over a day or two, so a missing wire doesn't check out

[MikkiJayne]

Its in the Basic Equipment wiring diagram, that might give a clue.

[Rightthen]

Its in the Basic Equipment wiring diagram, that might give a clue.

I looked yesterday, but I'll be honest, it didn't throw much light. I probably don't know how to read them very well. All the numbers next to the wires just outside the units are Greek to me.

After thinking about it this morning my theory is.... the motor has permanent live with an interruption that only lets the motor have power when one of the "speed" lives gets power. I'll have to wait till tomorrow to check, but I'm 90% sure the "speed" lives were not receiving power. Leading me to think the problem is probably at the stalk because i couldn't see another switch or fuse in the diagrams. Plus it wasn't an immediate failure. I have a spare stalk knocking about so if I'm getting no power from the other terminals I'll try and change it.

Also, on a side note, the diagrams only show 4 wires, so that extra wire on the motor side must have been there for another option. Auto wipers maybe?

[MikkiJayne]

The 5th wire could be anything, a 3rd speed, alternative park position, etc. No way to know without taking it apart since it isn't used on the D2. Probably it was useful on whatever model this motor was designed for originally.



53 and 53b are the positive supplies for the two motor speeds. I'd guess 53 is speed 1 and 53b is speed 2.
31 is ground
31b appears to be an internally switched ground, presumably to allow the mechanism to park.

This last one slightly odd as most older motors have a permanent +12v for this, but its hard to tell exactly because it goes through the intermittent module. It could just be an oddity of the diagram though. The PF diagram might be more help here since they didn't have the variable intermittent iirc. I'll have a look if I get a mo.

[Rightthen]

53 and 53b are the positive supplies for the two motor speeds. I'd guess 53 is speed 1 and 53b is speed 2.
31 is ground
31b appears to be an internally switched ground, presumably to allow the mechanism to park.

Good news (kind of) is I'm now 99.5% sure it's wired correctly. I had that original spare unit to bits so it was pretty obvious after that what went where. This does mean, however, that the problem is somewhere else. Looking at the diagrams there doesn't seem to be too many places to look, so that's a positive at least

[Rightthen]

This last one slightly odd as most older motors have a permanent +12v for this, but its hard to tell exactly because it goes through the intermittent module. It could just be an oddity of the diagram though. The PF diagram might be more help here since they didn't have the variable intermittent iirc. I'll have a look if I get a mo.

I didn't test the to see if the live was permanent with the wipers off. It will be the first thing I do when I get back there. I am pretty sure I was getting nothing from the other terminals in any state, but I was very cold and tired by that point.
The relay part of the diagram was another thing that was baffling me, due to the lack of explanation of the mechanics of the relay within its box. But I suppose that's not relevant to the wiring itself.
Interested to see what the PF diagram has to say. Thank you for that.

So I know I'm reading it right- is module E22 on the previous page the little lever on the top of the stalk to select intermittent speed?

[MikkiJayne]

E22 is the main wiper stalk, very poorly described. The little lever on top is all the way back on P17, current track 203 with the trip computer switches. That connects to J31 on track 443 (labelled 'POT' for potentiometer).