the rear wash wipe and wiper along with the heated rear screen are not working, i have power to the switches and the switches make a circuit when pressed, i have swapped the relays in the rear around and nothing works? oh its a 98 FL1 diesel if that helps! fuses are all ok as well.

I would check the wiring loom where it passes through the into the tailgate door - wiring might be split.

If you can open the rear door, as in , the window drops an inch. Then your vehicle is detecting a park signal from the wiper motor atleast.

Are the relays clicking when activated? If yes, your fault is between there and the motor or the motor itself. If not, then test for feeds and earths at relay, to make sure it either has the signals to activate the relay and that the created bridge has power and earth each side. If its missing its signal , check the output from the module.


If the relay clicks but doesnt move the wiper. Remove the taildoor panel ; 4 screws at bottom and pull from the base upwards. Then check to see if your getting voltage there at motor, if no , check wiring. If yes , i guess motor.


Heated screen is just 2 wires, power , earth. With the above interior panel removed , check you have both. The missing one is the fault

(im sure you'll find a common denominator )







I have no idea whats your fault , but get a multimeter and you can check everything you want easily.

well i know what the trouble is then vissie!! the rear window regulator is fubar and the rear door/roof seal thing has been modded to allow the door to be opened without the window dropping works and doesnt leak.... now how do i find the park signal to disable it?