Speedometer inaccurate?

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therammy

Junior Member
Joined
Dec 24, 2016
Posts
7
Reaction score
3
Ram Year
1995
Engine
5.2L Magnum
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.
 

dudeman2009

Senior Member
Joined
Feb 9, 2016
Posts
1,562
Reaction score
208
Location
Arizona
Ram Year
2001 1500 Sport with enough electrical modifications to make my brain hurt
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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