XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)
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Ignition off
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Disconnect the audio / carphone wiring by disconnecting the lower connector on the cruise control switch
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Ignition on.
Activate the buttons. Read off the status of the buttons in the cruise control switch
If the readings give a correct result, the fault is in the wiring between the audio / carphone switch and the cruise control switch.
Other information:
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To access the cruise control switch, see the relevant service procedure.
Was the status of the cruise control switch OK?
Yes - Fault Found
no - Checking components and wiring
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Checking components and wiring