The rear wiper isn't working nor the washer jet.

The rear wiper arm was corroded up removed it and took the drive unit apart expecting it to full of the brown gunk and/or the gear wheel to be stripped.

Joy... The gear unit is brand new inside. The grease not even spread out. so someone has put a new motor on it. anyone any ideas where to go from that ?

Good news it has a new gear cog....time to get ur metre out and start buzzing out voltage 1st at the motor then the fuse box