Cadillac Repair: climate control, volt ohm meter, control panal

Question
we have a 95 sedan deville in which when you turn the ignition key on the climate control panal display goes blank after a few seconds, all the readouts are there but the outside temp just has --- ,then after a few seconds everything reads ---,---,--- and so forth. any ideas?


Answer
You either have a fault in the DATA LINE going from the instrument panel to the BCM computer which will require several test procedures using a DIGITAL VOLT/OHM METER.

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