Quote:
Originally Posted by caw333
1998 Tahoe 5.7lt 4x4. Been working on this thing for awhile and here is my latest findings. But first lets recap... bout 3 yrs ago I was running through some water down a high line and found a hole that was deeper than it looked. While waiting on a guy to pull me out the fan was sitting in water and slinging water on motor. I shorted some electrical sensors out. I changed all sensors, computer, fuel injectors,distributor well pretty much everything electrical under the hood. The thing still has a rough idle and some backfiring out the exhaust. Its slinging a P0339 and a P0341 code. Ok all that being said, tonight I was checking wires out and on the WHITE plug that connects to the computer I have 2 black and white wires that got hot and so I started checking continuity off of the ground wires that got hot to see if they might of melted to other wires in the wiring loom. Heres what I found just by probing by holding the black probe on one of the grounds I got continuity on wires 17, 18, 2 and 22. And 22 also shows continuity to 21, but 21 doesn't to the other three. Now with 17, 18, 2 and 22 you can randomly touch any one of the 4 and get continuity. So before I start ripping all the wiring out of there covers my question is does this sound normal for these 4 wires to have continuity with each other and does any one know what these wires go to. White comp plug wires # 17, 18, 2, and 22. oh also I can put my meter on 12 volts and put the black probe on any of the 4 wires and put the red probe on the + batt and get a 12 volt reading. "Electrical problems are the Devil  " |
They are no sweat no problem with good repair info and a high end volt/ohm meter.
A good factory repair manual or a All Data DIY sub should lead you threw the problem.
They should have the pinout test and voltage reading you should have.
And remember you need a good high end volt/ohm meter to test voltage on computer systems.
Old analog volt/ohm meters will not cut the mustard.
