Wiring question????

[jktcummins]

If you have a bad ground to the ecm or the inj pump what all will it cause.

Also has anyone had anyproblems with the connectors at the inj pump or the ecm?????

 

[aircop]

jktcummins, Check all the grounds on the truck and connections at injection pump, and ecm, Have alternator checked also.
-It's not uncommon for a blown diode in the alternator to cause a pulsating signal in the power circuit. Check if the alternator has a blown diode

 

[jktcummins]

i will have to check on the alternator.