Its an 89 4x4 with the 3vze. On the thick wire loom coming from the pass fender to behind the cam gears there is a black with a white stripe wire that comes out of the loom rite where the temp sender for the egr comes out. It has a grey plug but mine has no wire out the other half of the plug. Is this normal unused or ground? With the truck running this wire produces a very small amount of voltage .05 or .005 cant remember now but its open loop when the truck is off.
Thanks for any incite!