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leak is the cause of relay failure
Back to square one: I thought I'd solved the relay side mirror/defrost problem by fitting a new relay, but after some torrential rain the problem returned. Removing the relay revealed it was full of water and shorting out. The root cause is therefore the water getting on to the relay.
I have scoured the posts on leaks, finding some evidence for a door seal or side-mirror related problem. I fully understand leaks like this require a methodical approach, but can anyone provide a systematic series of checks I can carry out?
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