Lum dada dum dada dum dada dum dada DA DAAAAHHHH!!!
Ford Truck 150 5.0L,AT,ID E8TF-12A650-AG2A G04001 $65 Tri City Auto Parts USA-NE(Holdrege) E-mail 1-800-445-9117
Ford Truck 150 5.0,AT, E8TF-12A650-AG2A Q6874K $Call B & R Auto Wrecking, Eugene USA-OR(Eugene) E-mail 1-888-325-8469
Their email is [email protected].com
Prolly not the computer anyway.
Check the 3 wires on the o2 sensor and see which one is grounded (hint, the black wire is directly connected so a spade lug as a ground somewhere on the chassis...part # C8AB-14463R) The other 2 are dark green/purple, and gray and yellow. The gray and yellow changes (somewhere along the line at a connector) to purple and orange at the fuse panel. This is your 12V source, so check it while the key is on and see if it has 12V at the sensor. The Dark green/purple goes all the way back to pin 29 at the computer (middle row 2 away from the middle bolt).
I'm not sure how the O2 sensor works, I thought it got a 5v reference from the computer and sent some of that voltage back as the AF ratio, and the rest went to ground, but looking at the wires, what they do and where they go I guess it robs the 12V from the P-O wire and sends a signal back to the computer vie the Green/purple wire.
All of the above is correct if I have read my Helms manual properly...
89 XLT 460