C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Help, Odometer works then shuts off??

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Old May 3, 2003 | 04:26 PM
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Default Help, Odometer works then shuts off??

Weird things are happening?
After car sits for a while the odometer will work for a couple miles then quits. I replaced the speed sensor and a different ECM and it did not help. Any ideas????


[Modified by 85vet, 4:27 PM 5/3/2003]
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Old May 3, 2003 | 06:59 PM
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Default Re: Help, Odometer works then shuts off?? (85vet)

The odometer itself has a single wire that plugs into it.Is this wire loose or coming off?Youll need to take the dash cluster out to see it.
Just a place id start.
:)
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Old May 4, 2003 | 06:48 AM
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Default Re: Help, Odometer works then shuts off?? (Bill's86Coupe)

Single wire - OK, I should have my diacom cable by the end of the week and I can check to see if the ECM is receiving the MPH. If it is out comes the cluster.

Thanks,
Jim
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Old May 4, 2003 | 07:55 PM
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Default Re: Help, Odometer works then shuts off?? (85vet)

Wo. Everything else works but the odometer doesnt rack up the miles. Doesnt sound like something I would fix. :D
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Old May 4, 2003 | 09:36 PM
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Default Re: Help, Odometer works then shuts off?? (blk90rdstr)

Wo. Everything else works but the odometer doesnt rack up the miles. Doesnt sound like something I would fix. :D
Sorry, the Speedometor, odometer, average miles per gallon, miles remaining for gas in tank. All items associated with the speedometer quit.
:confused:
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Old May 4, 2003 | 11:11 PM
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Default Re: Help, Odometer works then shuts off?? (85vet)

Reseat your PROM, ensure it is engaged. I bet you are also getting a SYS warning on your display if it is like the 1990. Then wiggle teh wires, first bump you hit is probably causing it to open. Check for an ECM Serial Communications Fault.


[Modified by Dougs 90, 10:13 PM 5/4/2003]
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Old May 4, 2003 | 11:23 PM
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Default Re: Help, Odometer works then shuts off?? (Dougs 90)

Doug 90,
Problem occurs with two different ECM's with two different proms. No sys error light displayed. I am hoping a loose connection under dash. I intend to test the signal from speed sensor to dash by using a drill on spare speed sensor.
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