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Check Gauge Light, Battery voltage spike, erratic speedo readings
2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
More tests done. All data states the volt meter goes to 18 when the voltage gets to 16.7 volts. When the meter went to 18 the DVOM only showed 15.8 volts. It is making me lean toward the gauge cluster being bad.
I have access to AllData which told me when the light comes on. I hooked up a volt meter to constant power and ground which gave me my voltage reading while driving.
Would be interesting to know what the PCM thinks voltage is....... though, it looks like it is indeed a fault with the cluster. On the 01, the cluster gets all its information from the PCM though, via the CTM...... so, if the PCM is seeing correct voltage, but, cluster is displaying the wrong voltage......
That is a relief, I hooked up the volt meter to my dome light socket with the dome light OFF and grounded on the metal from the roof. I just drove it on the highway with the peak voltage being 15.2 no gauge light either... how can I test the PCM voltage?
Last edited by Mark Woolf; 04-24-2018 at 03:21 PM.
Reason: Grammer