The wipers on my 2003 Defender Td5 recently stopped half way across the windscreen. I checked the fuses (all okay) and took the dashboard apart and manually assisted the wipers back to their correct positions while operating the switch. The wipers worked fine afterwards, so I put the dash back together. I went out in the rain yesterday and the wipers stopped mid-screen again.
What’s going on?
Chris Monk, Cheshire
This is a tricky one as the wipers have stopped but not blown any fuse. My initial reaction is that it is a break in the circuit, but that could mean the switch, the wiring or the motor.
Next time the motor stops mid-screen you will have to gain access to the motor and remove the gearbox cover plate. Then remove the link and disconnect the rack and cable. Now see if the motor will run. Try in both normal and high speed. If it will run in neither you may have lost the earth to the common brush.
If it does run and you have checked the earth wire, then you will have to fault-find the wiring to the motor, checking you have a 12v supply to the brushes. Remove the wiper arms from the wheel boxes and pull and push the rack inside the tube. If it is stiff you can pull it out, grease it and push it back. If the wheel box spindles are stiff (with the rack out) dismantle and grease.
On rebuilding, don’t fit the wiper arms until you have run the motor and it has parked. Only then can the blades be fitted correctly at the park position.
This fault has nothing to do with the park switch which has no function in normal running.