Just bought an '03 Wrangler and drove the 1000 mile journey home with no instrument panel lights (Headlights, tail lights, gauges and warning lights all work fine). After googling the issue, I proceeded down the path of tracing out the issue.
- Fuses were all ok (replaced them anyway)
- Bulbs work fine (replaced them anyway)
- Headlight Switch (ordered a new one and installed with no improvement)
I've checked out the Haynes Manual wiring diagram, which provided little clarification. I thought the headlight rheostat was the issue since it is the only "switch" that affects all of the instrumentation lights. Replacement of that did nothing. All connections appear to be good with no signs of damage or wear.
I originally thought the instrument panel may have a problem, but it's also affecting the A/C Control knobs and radio controls (none of which work either).
Upon closer inspection, I've got a error code of P1687 ("No MIC BUS Message"). Research has yielded that there may be a problem with the CCD Bus, but I have no clue where it is (besides in the dash on the steering column) and how to determine if there is an issue.
Has anyone had to dig this far and been able to find the issue? If so, please HELP!
Thanks, Cory