wipers..... again
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(In Topic #84883)
Old Timer
wipers..... again
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Old Timer
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Settled In
MP
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Old Timer
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Settled In
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Old Timer
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Local Hero
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Local Hero
yeha said
The latest - When I have the motor running and touch earth, there's a huge spark and the fuse blows. Now does this mean that the wiper brackets are meant to be insulated? I'm sure I measured the resistance between the casing and earth and it was virtually zero.
I think this means that the outer casing of the motor is live, and touching it to earth creates the short circuit which causes the fuse to blow.
It's strange that changing the motor still causes this effect - perhaps it's the connector or wiring which is at fault, meaning that the casing of any motor is live once it's switched on.
I'd be surprised if the wiper brackets were supposed to be insulated from the earth, as it's all metal and connected by metal screws to the bodywork.
Seeing as you've eliminated the switch, the relay, and the motor from the equation, I think the wiring is probably worth checking next.
HTH
Rich
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