Question about 2010 Volvo S80
Radio turns on and off, AC turns on and off there is a relay clicking sound.
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Start car everything ok. all
You need to have the entire circuit checked which flows through the mains switch. It seems that upon starting when all circuits are OK, there is a switch/relay/connection failure breaks the circuits described .
Now since the ignition system gets the supply the engine works on.
So trace the INPUT voltage to the mains switch, check the output to the secondary circuits, check them one by one, if they fail to output LOOP A WIRE and if the circuit is established then the mains switch is the suspect.
Also check the sub - relays in the relay box as it can fail after contact, check each output to find the missing voltage. Easy way is to use a test lamp of 12 Volts and trace if usingg a multimter becomes difficult as the visual indication makes if easy to touch and proceed to find the open link or switch.
Posted on Sep 13, 2011
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