where is the ECM ground pigtail located ? my CEl is on and truck cuts out , not able to read codes , scanner says bad pig tail where is the main ground location ? or pin numbers on ecm for the ground ? 5.8 motor

 

If the engine runs, the EEC ground is OK. Read this thread:

http://www.fordf150.net/forums/viewt...p?f=21&t=97221

 

this is not my problem , i have OBD 1 , heres whats going on .... the truck sat for a few years and all the connectors are crusty i've relaced all the bad ones and have a new EEC . BUT when the truck starts it runs fine for most of the day then it pukes out , only a snap-on scanner gave me 1 code only and that was a bad pigtail thats why i think its the EEc main ground ....where is it located , have a pic ?

 

There is no code for "bad pigtail", and the EEC case ground is the black wire at pin 20 in the EEC connector. Follow it if you want to find the ground point. It's probably a green screw near the L hood hinge.

I know your truck is OBD-I, as are those in that thread.

It doesn't matter how long the truck sat - I've let my Bronco sit for 2 years, and I've repaired 2 trucks that sat in the woods for 6 years each.

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