My Escort's just developed a strange fault where my rear windscreen
wiper 'rarely' works, it can start working after a delay of anywhere
between 30 seconds and 10 minutes, it then sometimes stops 'mid wipe'.
When I have my lights on, activating the rear windscreen switch also
switches on my fog light and front windscreen heater.
Any ideas what this could be?
And for those who say "What? How would that cause this type of fault", the
power tries to get to ground somehow, and if it can't get there through normal
connections, it will travel backwards through whatever other "inactive" device
is on the same circuit. That's why you occasionally see a car with one bright
and one very dim headlight; the dim one's power goes through its own low-beam
filament, then through its hi-beam filament (instead of to ground), then over to
(and through) the other headlight's hi-beam filament, where it finally finds a
Too much resistance for full-current flow, so the "bad" side is just barely on.
You only need a small current (either direction) to switch on the control relays.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.