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Discussion Starter #1 (Edited)
My truck started not showing my mph or rpm and my oil gage is acting vary odd I’m not sure where to start I’ve been told it’s my pcm or a bad ground can anyone give me a starting point to start looking to solve my problem my truck is 2008 ram 1500 5.7
 

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Clean your battery terminals, then your best bet is to try and find a wiring diagram showing you the ground locations ,then loosen , remove,clean with wire brush and reinstall these ground wires . Maybe the grounds in the engine bay will be the place to start .as there are ground wires all over.
 

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185 Posts
Clean your battery terminals, then your best bet is to try and find a wiring diagram showing you the ground locations ,then loosen , remove,clean with wire brush and reinstall these ground wires . Maybe the grounds in the engine bay will be the place to start .as there are ground wires all over.
Possibility the battery may be on its way out. These trucks can act very odd when this occurs.
 
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