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Speedometer inaccurate?

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The speedometer on my Ram is only accurate for any speed under 30MPH. After that, it lags behind and at ...

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Old 12-24-2016, 09:33 PM   #1 (permalink)
therammy's Avatar
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Join Date: Dec 2016
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Ram Year: 1995
Engine: 5.2L Magnum
Question Speedometer inaccurate?
The speedometer on my Ram is only accurate for any speed under 30MPH. After that, it lags behind and at around 70MPH it shows I'm going around 45MPH.

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therammy is offline   Reply With Quote
Old 12-26-2016, 11:59 AM   #2 (permalink)
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Join Date: Feb 2016
Location: Lansing, Michigan
Age: 22
Posts: 1,292

Ram Year: 2001 1500 Sport with enough electrical modifications to make your head spin
Engine: Magnum 360
Run a cluster self test.

Ignition off, hold down the trip reset button.
While holding button turn ignition to run.
Wait until odometer shows 'check'.
Release trip reset switch and watch cluster for about 1 minute. All LCD digits will test followed by all gauges performing a full sweep in three increments.
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