Is there a way to chase grounds through the PCM connector?

 

Don't know about that but I can tell yuh where all the major ones are.

 

Where are the major ones?

 

1.Box to frame rail
2.Lower Cab - Passenger side floorboard, = cab to frame rail
3.Inner cab grounds, = behind both kick-panels in cab.
4.Firewall starting from the far right (passenger side),-
a. PCM - Passenger side firewall next to the fender.
b. Battery ground & misc.
c. Engine to cab ground.
5. Battery ground routs to passenger side frame rail behind the tire then continues to engine next to the starter.

Absolute Ground, - Alternator to Block ground.

 

OK thanks. I'm a newbie so i'll do some research and see if I can find/check all of the these.

 

Yea, they are all easy to find. The smaller grounds use green 8mm bolts. Like in the cab and on the firewall.

 

Thanks for the info. I ended up taking it to the dealer and they said I had a bad coil which caused Radio Frequency Interference with the PCM.