Technical Rear wiper not working and motor very hot

[hmm]

Multipla JTD ELX, 2000, 80,000 miles.

Rear wiper worked fine until 79,999 miles. Hit 80,000 and it stopped. Is this programmed in!?

But seriously, it's stopped working. Front wipers, front and rear washers work OK, 12V is getting through the wire, so not a fuse problem. But when I turn the rear wiper control on, the wiper motor gets really really hot. Is this a case of it being seized up and needing a lube (as seen in other threads) or is it caput?

Thanks

 

[JTDman]

Is this a case of it being seized up and needing a lube (as seen in other threads) or is it caput?



Yep.

 

[BikeDoc]

Apologies for resurrecting this but thought it better than starting an identical topic...

My rear wiper is displaying the same symptoms, although the motor is just getting 'lukewarm', not hot.
When I switch it on, there's a click from the small relay on the wiper unit, but no movement.

I stripped it down as far as I could last night (quiet night at work), and thought I'd found the problem.
The contact 'fingers' that bear on the back of the worm-drive main gear (to 'park' the wiper when you switch off) were pretty mucky, as was the contact plate on the gear, but cleaning them made no difference.
Resistance across the motor is 63 Ohms, I'll check it with a battery later.

The relay is non-strippable, but I might cut the cover off and take a look at the contacts.
What did you end up doing with yours hmm?

 

[BikeDoc]

Fixed it!

Had another go at it yesterday, connected a battery directly to the motor connector, and it ran...for a few degrees of rotation, then it locked up.
Reversing the polarity gave the same result, but in the opposite direction.
I noticed the wiper shaft itself wasn't actually moving at all, it was just taking up the backlash in the mechanism each time.
With lots of to-ing and fro-ing of the motor, and plenty of lube (squirted into a couple of 1.5mm holes I drilled into the bearing/bush housing), I eventually got it moving a bit, and removing the clip from the shaft and tapping the shaft in and out several times (as far as it could move) finally freed it off enough to go full-cycle.
It's still a little stiff, but it works.
I'll give it a squirt of lube every now and then, and hopefully it'll be OK for a while.