I have a 1999 dodge ram 1500 4x4 with a 5.9 pcm is good (tried on another vehicle) but keep getting no bus no gauges will turn over grounds are good is there anything I should do or check or any procedures thanks

 

Will a scanner talk to it?

 

No communication to the scanner

 

I would suspect a failed central timer module then. That's how everything on the truck communicates.

 

What and where is that

 

Get the service manual for your truck here. There is a component locator in section 8W. that'll tell ya where it is, and may even have some test procedures.

 

I'm confused. Are you trying to install a used PCM onto a 1999 Dodge Ram 5.9 gas motor 4x4 truck or swap the PCM from a 1999 Dodge Ram 5.9 gas motor 4x4 truck onto another vehicle? Please explain further with additional details, as there are a lot of PCM differences for the gen 2 trucks.

 

Pcm is good it is on the truck just tried on another to make sure update runs when you have a scan tool hooked up to it dies when unplugged and ideas

 

Anyone only runs with scan tool hooked up dies when taken off I'm lost

 

Check power feeds and grounds for the PCM.