leatiger1

GLC Wipers Not Working Error Code Present

My 2018 Mercedes GLC with a gasoline engine has completely lost its mind when it comes to the car wipers. They just don't work at all! The windshield wipers are dead and a light popped up. Hooked it up to a reader and got an error code related to the wiper motor. I'm guessing it's probably something simple like a bad connection, maybe a chafed wire in the wiring harness? I'm trying to avoid a huge bill. Has anyone else run into this? Turn signal and cruise control are still working fine. Car has 165422 km on the clock.

4 comment(s)

Intermittent or total failure of the windshield wipers on a Mercedes GLC, especially with a stored error code, does indeed point towards a potential wiring or connector issue. However, before assuming the worst, have you inspected the wiper motor relay and the fuse associated with the wiper system? A failing relay or a blown fuse can mimic the symptoms of a faulty wiring harness or a defective motor. Moreover, does the error code provide any specific details regarding the nature of the fault, such as an open circuit or a short to ground? Any additional information would assist in narrowing down the potential cause.

I did check the fuses – all seem good. The error code was pretty generic, something along the lines of "wiper motor circuit malfunction." I didn't think to check the relay though, where would I find that? Also, if it IS a wiring issue, is that something a decent mechanic can usually sort out, or are we talking specialist auto electrician territory?

Given the generic error code and the elimination of the fuse as a potential cause, inspecting the wiper motor relay is the next logical step. Consult your vehicle's owner's manual for the precise location of the relay, as its placement can vary depending on the specific configuration of your GLC. If the relay proves to be functional, a thorough inspection of the wiring harness, particularly the connector at the wiper motor, is warranted. While a competent mechanic can typically address wiring issues, diagnosing intermittent faults within a complex wiring harness can be time-consuming and may necessitate the expertise of a technician with specialized diagnostic tools. Based on the information you have provided, I would advise taking your Mercedes GLC to a trusted workshop.

I took it to my usual guy, and you were spot on. Turns out it was a corroded connector on the wiper motor. He cleaned it up, applied some dielectric grease, and everything is working again. Bill came to 95€ which is way better than a new motor! Appreciate the help!

Join the discussion now: