What is the first thing to check when the air conditioner suddenly stops working
What is your question?
Dealer says replace the relay first. How do I check that the relay is working without having to pay for that expensive 'non-returnable electric component'?
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Where is he relay? Is it the 50 Amp square 'fuse' in the engine compartment box?
yes that sounds about right their may even be a wiring diagram on the side