Instrument panel lights not working

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coryangst@hotmail.com - 30 Aug 2007 01:57 GMT

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

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twaldron - 30 Aug 2007 02:45 GMT

> Just bought an '03 Wrangler and drove the 1000 mile journey home with
> no instrument panel lights (Headlights, tail lights, gauges and
[quoted text clipped - 25 lines]
> Thanks,
> Cory

Probably not much help here, but as I recall there was an issue with a
connector behind the dash coming loose. It essentially killed the dash.
I dealt with it on my 99 TJ and I honestly can't remember if I had to
deal with it early on with the 03. I do remember there was a TSB on it
though. There were a couple of fixes as I recall, dielectric grease and
manipulating the connector somehow. It was warranty work so I've let it
go from my storage banks. :)

tw

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hillpc@emailaccount.com - 30 Aug 2007 02:51 GMT

On old cars this is caused by losing the dashboard ground connection
(nut/bolt vibrates loose). Poke a well-grounded wire behind the dash
onto the metal to see if they come on. But an '03? Nah, probably
not.

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Mike Romain - 30 Aug 2007 04:17 GMT

I don't have access to it right now, but there is a recall for some of
them because the ground for the dash comes loose. There are two ground
wires and the bolts are too small for the threads or something so they
tap them out and put bigger bolts in to hold the wires to the dash.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
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> Just bought an '03 Wrangler and drove the 1000 mile journey home with
> no instrument panel lights (Headlights, tail lights, gauges and
[quoted text clipped - 25 lines]
> Thanks,
> Cory

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