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I need a pin-out for a 91 explorer PCM...


shad

Member
Joined
Feb 19, 2013
Messages
9
Vehicle Year
1989
Transmission
Automatic
I am having some shorting issues on the MAP, O2, TPS, ACT, and the ECT. All are connected by a common gray/red wire. All have continuity to ground. When I disconnect the wiring harness from the PCM, the sensors no longer have continuity to ground. Is the PCM bad? The return wire for these sensors in pin 46. I need to know where it comes out and where does it go?


Thanks!

Shad
 
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