Have stock 1988 GT. Odometer quit. Speedometer and trip odometer work fine. Also, cruise control does not work. Where should I start looking for a fix? Thanks.

I had trouble with this on my '84, I'm sure the gauge layout is a little different but the motors may be the same. I bought two odo/trip/speed clusters thinking that the circuit board was the issue, but odo still didn't work. Finally I relented and switched out one of the motors with the one driving my odo and sure enough that was the prob.

I had no odo or trip counter. Trip counter magically started working again. No such luck with odo.

On my 88GT, my trip odometer would only read for about 0.9 mile and then would stop. It reset just fine. After removing it to troubleshoot I noticed the plastic housing had deteriorated to the point that it would no longer support the gear shafts. Ended up replacing it with a junkyard unit and it works fine now.

Thanks, I will look at that. Does the fact that the cruise control is not working have any affect on the odometer not working?

quote Originally posted by fiero5150: Thanks, I will look at that. Does the fact that the cruise control is not working have any affect on the odometer not working?

Probably not. The cruise control is in a separate module that lives under the carpet near your right knee. Since the speedometer is still working, that indicates that the speed signal generator and the wiring is good. For the odometer, you can take the speedometer out of the cluster. You'll see two little electric motors, one for the trip odometer, one for the odometer. Follow the wires on the motors and you'll see where they plug into the circuit card. I think you can swap the plugs. If so, do that and see if the problem moves to the trip odometer. That will tell you whether the problem is in the odometer motor or gears or in the circuit card.
As far as the cruise control problem, you really need a copy of the wiring diagram and trouble shooting section out of the factory service manual. Any number of things can cause an inop cruise control.

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Rod Schneider, Ball Ground, Ga.
"You can't have too many toys!"
1988 Fiero GT
1987 Porsche 944S
1987 Corvette
1966 Porsche 911
2001 Chrysler 300M
Van's RV-6 airplane

Thanks Rod. I will follow your tip and see where the problem lies.

Does the odometer not working have anything to do with the dimmer wheel not working? Maybe this is just a sign of loose or disconnected wires behind gauges?

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===Always trying to find time to work on cars===
Louis Duet
Baldwin, Long Island, NY
Where driving hard is SOP.
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"Blue" <= '85 Fiero GT
Stock V6---Stock everything. Trying to keep it 'mostly' that way.
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"Boo" <= '81 Delorean DMC-12
The "DuetLorean"
VIN #5835
Stock PRV engine
Robertson Equipped
Neiland/Delman Engineered
Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"