A/F gauge wiring question

[boostranger]

ok heres the deal. got an air fuel gauge from autometer and i want to put it in my 91 XLT to help me avoid a repeat of the nightmare 5 weeks ago. i have the wiring diagram for my x and can't decide which wire to splice the signal wire into.

its a 4 wire O2 sensor and the wire are as follows

ORG-BLK .... goes to fuse #18
GRY-LTBLu ..... goes to pin #29 marked HEGO
BLK-WHT ..... goes to battery ground
ORG .... goes to a splice the branches out to a bunch of sensors.. CTS, MAP, self test etc and also 2 pins in the ecm. pin #46 Sig rtn and #49 HEGO GND


My guess is that it goes to (GRY-LTBLu ..... goes to pin #29 marked HEGO) but i want to make sure before i actually start splicing wires and screwing stuff up.

 

[Alec]

Call Autometer and they'll tell you which wire they recommend. They might need a few hours to look up the wiring for your truck, but they will call you back and give you the correct wire.

Good luck!