Need Help

Hey guys I'm new here and I need some help.

I have a 98.5 24v 3500 4x4 The only thing on the dash that works is the tach. I have tested the cluster and it tested ok. When you drive it all of the warning lights come on. The computer is saying that the bcm and the pcm are not talking to eachother.

Thanks for your help!!!!!!!!!!!!!!!!
BOOSTBROTHER

 

tap tap tap is this thing on ?????????? still need some help.

 

WHat codes are it listing?

 

The code says no bcm input.

 

Not sure how you would do it but you would need to test the bcm to make sure it is in working order or not and go from there.

 

I'd first check electrical connections. Sounds like your ECM is either bad or not getting power.