If the resistor is out of range that is your problem maybe. Chart shows what levels should be. Also, pull harness at trans and see if you have five volts. You should if you have more then the problem is elsewhere. You keep saying you replaced the ECM, but as this is an OBD1 system could it possibly be the prom is bad making you think the ECM is the problem? Have you tried that as it should only be sending five volts not seven.
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Wednesday, January 18th, 2017 AT 7:20 AM