[wyn burgess]

Not sure, I'm no auto sparks but I doubt whether 645 UCH in the passenger compartment could be the issue. The main power to the wipers comes from 260, the UPC switcing protection unit in the engine compartment. Assuming the fuses are OK here, I think the issue lies with the motors. Seem to recall that another poster identified a blown thermal fuse on one of the wiper boards as the problem?

 

[wyn burgess]

Yes, I was looking at the wiring diagram for my wife's Captur and 260 is described as a UPC so maybe it is different on Scenics (not worked on later Scenics). Matters not as the motors are being fed. Best.

 

[wyn burgess]

As Ours says the motors must be controlled by the single LIN wire from 645, lots of information on line like:
LIN Capture for Component Testing — ATA - Modular Flow Management Seems you can test the signal with a multimeter but it does say that the signal may be shut down if a fault is detected. If it was me I'd be dismantling the motors to look for water damage, lack of grease, testing the thermal fuses for continuity etc then connecting them up to see if they work. If not I guess the next step would be get the codes read with a decent reader & clear any that look to be related to the wipers. Lastly (in desperation) I would buy replacement SH motors, at least on Ebay you should be able to get the ££ back if they don't work. Best