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1998 Grand Caravan Instrument cluster

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3 replies to this topic

#1 jimmcg (converted)

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Posted January 25, 2004 at 09:02 am

All of the guages on my 98 Grand Caravan Sport went dead. I checked the fuse and it was good. I don't however have any voltage at the fuse itself. The Hayes manual I have shows a diode on the input of the fuse. A blown 10 cent diode can bring down anything. Anybody know where this is located...in the junction panel itself, maybe? I have seen other "fixes" that I will try. The shop says I need a new cluster, which I somewhat doubt being that there is no voltage there. Thanks...Jim

#2 jimmcg (converted)

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Posted January 25, 2004 at 09:26 am

I used one of the "fixes I read on another board and it worked. I pulled/reseated the IOD fuse. It is a 10 amp fuse in the power distrubution box under the hood. It is all by its loansome at the top of the unit (closest to the windshield). All the gauges came back. Hope this help someone else. Its a cheap test.

#3 John Wood

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Posted January 25, 2004 at 09:53 am

The diodes are on the junction box, under the lower left dash (knee bolster area). You will see the junction box and be able to identify it because of all the relays in it.

The diodes are situated with 2 on the left and 2 on the right (far left and far right of the junction box). They are next to the larger square relays.

Of the 4 diodes, lower left is #1, Lower right is #2, upper left is #3, and upper right is # 4.

It looks like, coming out of your ignition switch, the hot wire is dark green with red stripe which goes to one side of the diode. Then through the diode (D1), it goes through fuse 2 on the junction block and then up to the instrument cluster via a red with white stripe wire.

So check fuse 2 with your test light for power on both sides. Pwr on one side means bad fuse and power on no sides may mean a bad diode, but be sure there is power on one side of the diode before condeming it.

If all that checks out, also be sure you have power on the pink wire feeding the instrument cluster. That appears to come from fuse 10 in the PDC under the hood.

This information is based on an earlier model, but I believe things stayed the same from 96 through 99.

Good luck and let us know what you find.

Edited by John Wood, January 25, 2004 at 03:00 pm.

#4 John Wood

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Posted January 25, 2004 at 10:00 am

OK, Isee you found the problem, just before I posted, but tuck this information away anyhow. I'll keep in mind that IOD fuse if I ever have that problem.

Glad you did not get suckered into buying a new cluster.

You know they would have put it in and when it didn't work, they would have found the fuse problem. But you would have been charged for a new cluster anyhow, and the dealer would have made a nice profit. :angry:


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