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Mon 30 Nov 2015 18:21

Vectra b tourer estate 2001 - Rear windscreen heater - rookie48

When I switch the rear heater on the dashboard lights go dim and it blows the 40amp fuse. Dead short I suspect. I have removed rear screen trim and had a look at the screen connections but can't see much . Do you have any thoughts on the problem. Apart from an expensive visit to Vauxhall dealer to trace the fault.
Many thanks rookie49

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Mon 30 Nov 2015 18:52

Vectra b tourer estate 2001 - Rear windscreen heater - Railroad.

Connect a 12v bulb across the terminals of the heated rear screen fuse and switch on the ignition. If the bulb lights at full brightness you have a short circuit. Disconnected the heated rear screen and see if the light goes out. If it does you have found where your problem lies. If t stays on you still have a short circuit. Push and pull the wiring about until the light goes out, and when it does it's a matter of locating exactly where the fault is. Common places are where the wiring goes between the tailgate and the roof. Chafing to earth here is the likely problem.

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Mon 30 Nov 2015 18:53

Vectra b tourer estate 2001 - Rear windscreen heater - elekie&a/c doctor

Does your car have heated door mirrors,as they are on the same circuit.?Not too sure why you want to take this to a main dealer,there must be plenty of electrical specialists around.

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Tue 1 Dec 2015 00:11

Vectra b tourer estate 2001 - Rear windscreen heater - Peter.N.

If you can disconnect the rear screen at the window and the fuse still goes you have a wiring short, if it doesn't must be the element on the window although Its unusual for that to happen.

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Tue 1 Dec 2015 16:42

Vectra b tourer estate 2001 - Rear windscreen heater - rookie48

The mirrors are on the same switch and work ok thanks

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