Electrical problem gauges go on and off sometimes all gauges and radio including speedometer, sometimes only partial gauges, and when this happens it will not allow the alternator to charge, security light also comes on. Is the a relay that is bad or body control module or ECU?
Have you found an answer to this question? My 2003 express van started to do this when it is raining and the engine started to run rough, also check engne light came on but I can't get any trouble codes from the computer. The cigar lighter fuse is not blown that is the first thing I checked.
Thanks in advance for any help.