306 HDI 1999 Rear wiper stopped? - tystie

Hello,

Have recently had a spell of bad luck with my 306 as has been to three garages to eventually find a relatively simple fault - coroded wire linking ignition to fuel pump. Rear wiper has ceased working since at garage.
To avoid putting car into garage again might it be a problem I could fix myself? I'm no car expert but am able to try simple stuff (eg fitting new wiper motor)
The correct fuse in in right place according to maual and is not damaged or blown as far as can see.
Wiper has stopped in the up position.

ANy advice would be good.

cheers