99myr 156 Front Electric Windows - Alfa Romeo Forum
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(Post Link) post #1 of 3 Old 28-03-11 Thread Starter
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99myr 156 Front Electric Windows


I wondered if you can help :-

My 99myr 156 24valve V6 has developed an electrical fault, both front windows have stopped working, the fuse blows as soon as you fit a new one.....both rears work ok.
I have disconnected both front doors on the twist plugs ..still blows the fuse !!

Would any one have a wiring diagram of the front window circuits ? there appears to be some control box fitted...(as the wiring to the motors is 2.5mm wire with different colours to switches)...the signal wires at the switches change polarity ok and the switches work ok.

Any help would be much appreciated.

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(Post Link) post #2 of 3 Old 30-03-11 Thread Starter
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Update on front windows n/w


Investigated the fault with the circuit to the front windows, removed the glove box assembly for access to the Window ECU carried voltage and continuity tests on wiring to ECU (i fed the two window motors and reversed polarity to fully test the motors up and down ok) Power and gnd test ok. Switch +12v up and down ok (please see circuit enclosed)...suspect ECU fault ...removed and found water ingress on pcb and relays. Going to try and locate one as a lot of work to repair !

cheers hope this helps


image of circuit is not brillant...
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File Type: jpg 156 electric front windows diag.jpg (64.7 KB, 34 views)
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156 , 99myr , electric , front , windows

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