Hi.

Having issues with my wipers on my 2007 l322, can any one help?

Auto logic is showing “wiper relay - open circuit”.

I have swapped the relay for a good one that I know works, but still got the issue.

Dynamic data from the Body Control Module shows that the wiper switch is working.

Fuses are fine.

Is it likely to be wiring?

Or has the motor possibly packed up?

Any suggestions would be great.

Thanks

Hi there.

A little more info.

I have put a Multi Meter on the wires that supply the Relay.

The wiring Diagram suggests that the Red & White Wire is a permanent positive feed to the relay from the fuse Board, but it was showing zero volts.

The Fuses are all OK?

Am i missing something here?

Why am I not getting 12V up to the relay?

Any suggestions would be welcome.

Many thanks

(With the proviso that I am not an auto-electrician)

You're not getting a supply -to- the relay yep? In that case I'd leave the relay alone for the time being.

Did you check resistance across the fuse or continuity? I would check resistance and if that is fine (i.e. very low resistance) check the wire from the fuse box, as close to the box as possible. If that shows power then you appear to have a wiring issue. Does the wiring diagram show any plugs or splices between the fuse box and relay? The reference number should tie up with the electrical library (see the wiki) and show the location. The library is 2002 I believe but I cant imagine the wiper wiring changed much. I'd check at any splices or breaks (working from the fuse-box towards the relay) for power. Hopefully the fail is at a splice or plug and can be repaired but at worst you should be able to trace the length of wiring that has failed.

BTW, When you checked the supply to the relay did you use the relays own earth terminal? If so maybe use a separate earth point, on the off-chance the earth has broken and the supply is ok.

Good luck!