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91 dodge 1ton 5.9

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Old 05-19-2013, 01:16 AM
sdjordan87's Avatar
sdjordan87 sdjordan87 is offline
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Default 91 dodge 1ton 5.9

Ive got a 91 dodge cummins my speedometer wont work tachometer or odometer i bought a speed sensor for it and the speedometer still wont work the wore that plugs into it is good i tested it for continuity any suggestions on where else to look im wanting to avoid taking the dash apart
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Old 08-25-2013, 10:31 PM
snobuster snobuster is offline
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Vehicle: 96 3500 4x4 diesel, 91 350 diesel flatbed, 91 250 4x4 ,79 warlock , 78 warlock,85 crewcab 300
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I have a 91 cew cab d350 with the cumins,my speedometer would not work either. i replaced the distance sensor on the trans, no change,checked continuity from sensor to the ecm and it was good for both wires, the same to pin 6 on the instrument cluster. I pulled the speedo and checked for power , i had 12 v between the center(B+) pin and the top(ground pin). The last step was to check the speedo over very carefuly and i found a discolored resistor and part of the printed circuit missing. I was able to find a speedo out of a 1990 and it looked to be ok, installed it and I now have a speedometer. You may have the same problem as these speedos are a pain.
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