Other XC90 Problem: Checked all fuses and relays. Wipers still won't work

[JenniferT]

Hi. Just acquired a 2006 XC90. I just replaced the wiper motor and control lever. All the fuses look good. Tried a new relay in the box under the hood. I can't get the front wipers to work. The rear wiper and the sprayer on the front work. I'm stumped. I checked the fuse box under the kick plate under the steering wheel as well. Any ideas?

[Moose Test]

IF all the parts you say you've checked/replaced so far are good (relevant fuses, relays and the wiper motor itself), then the problem can really only be in either the loom and/or its connections, or in the CEM.

You really need to take a copy of the wiring diagram and a multimeter and checkout the appearance of the expected voltages and continuity at the relevant points (connector pins). I'd be checking grounding in particular.

[Andymharrison]

Did you verify the stalk is working ok?

My indicators stopped a couple of years ago, I went down a rabbit hole of checks before realising all it needed was the contacts in the stalk having a good clean, I expect the wipers will suffer the same.

[reggit]

Switch in the stalk is the next place to look.

I’d also be having a meter on the motor terminals to see if it is receiving 12v and not faulty (it’s possible a replacement can do DOA).

I’d you have access to Vida, that will point you in the direction for fault finding and can tell you if the switch is working.