Planning the next
AO Silver Member
Join Date: May 2007
Location: United Kingdom
Have you disconnected the washer motor? You've disconnected both connectors at the motor?
The other two components you need to look at and disconnect are the column stalk and the N14 device. N14 is bolted to the side of the fuse box and you have to remove it in order to prise out the connector ( no lock mechanism - it's just very tight ). There was a recent thread on here about finding and removing N14 - within the last couple of months. For the column stalk, I'd remove the cowl and disconnect at the stalks.
It's may also worth checking the connector in the boot ( 2 litre V6 TB washer pump ) that it isn't shorting on anything although it is very unlikely to be the problem.
Having disconnected everything check for a short. Have you got a multimeter? If so remove the fuse and establish which side of the fuse is the supply with the ignition on by using the volt checking range on the meter. Attach the negative meter lead to the car body and probe with the red lead. You're looking for battery voltage on one side of the fuse.
Switch off the ignition, and switch the meter to resistance check.
Put the red probe on the other ( non supply ) side of the fuse and check for no resistance. If you have a short, it's somewhere between the fusebox and the 'B' connector at the motor. Chafed loom where it passes through the bulkhead?
If that is OK, plug the 'B' connector ( should have 4 wires whilst 'A' has 5 ) back into the motor.
Repeat check for short. If you now have a short you either have a problem with the wiper control box attached to the wiper motor ( unlikely as there shouldn't be a ground connection at this stage ) or a fault in the loom. If the latter, you need to check each of the other three wires in connector 'B' individually.
If OK, reconnect connector 'A' at the wiper motor.
Again check for a short. If OK disconnect 'A' and reconnect N14. Check for a short. If OK, disconnect N14 and connect the stalks. Check for a short.
If OK, repeat the previous tests with wiper motor connector 'A' connected.
Finally, reconnect the washer motor and recheck ( this is unlikely to be the problem ).
At some point you should find a short. Knowing what you last plugged in, should help to identify the problem and then you can test individual wires to narrow it down to a bad wire or a bad device with the wiring diagramme in the manual.
You may, with some tests get some resistance showing on the meter, that is OK. You're looking for zero resistance.
My guess is that you either have a fault in the control box at the wiper motor or a diode has blown inside N14.
Hope that helps.