ok well that’s good to know lol

Pin 85 in the socket registers 06.0ohms
(i have the positive lead in the socket and ground lead on the battery ground terminal)

 

You have a short somewhere. Follow the wire back to the PCM, see if it got pinched somewhere. (yeah, I know, that's gonna be fun......)

Edit: Might try unplugging the connector the wire goes to from the PCM, (ignition still off) and see if it still has a short to ground. That will tell you if it's the wire, or the PCM. (connector 137, pin 19)

 

ok well any news is good news to me lol

which wire do I follow back to the pcm the one to pin 19?

137 is the grey one right?

 

Keep in mind, I am looking at the 96 service manual, so, wire colors may not match..... The one I am seeing, is brown with a white trace. Think I would just go to the pcm connector, find the right wire, see what color it is.

 

yea I have it in alldata as well as dark brown with white trace
i double checked at the pcm as well ive pulled back all the tape and channeling and oddly enough that looks like one of the cleanest wires. I can’t find any pinches or issues anywhere with it. If I leave the voltmeter on and wiggle all the wires I dont get any fluctuations which normally if there’s a pinch it would fluctuate when wiggled

 

Starts to look like the PCM has failed..... Which seems really bizarre...... Can you test resistance on that wire to ground, with it disconnected from the PCM?

 

as in remove the wire from the pin housing/connector and test? Or just jam it in the 19 pin hole? Because jamming it in the pin 19 hole with the red lead and putting the. Black lead at the ground terminal gives me no reading at all

what seems weird is even if I completely disconnect all 3 connectors from the pcm the voltage at pin 85 on the pump relay with key on still displays 12.3V
but if I plug in the pump relay with pcm disconnected it doesn’t prime the pump at all

 

Normal. Voltage to pin 85 is supplied via the ignition switch. PCM controls ground side of the circuit.

Should be able to just unplug the connector, stick your probe into the appropriate hole, ground the other one, and see what you get. (ignition off.) Should be an open circuit. (leave the relay out too.)

 

Easiest is probably to unplug the connector and then check resistance to ground at the relay socket. No need to fiddle with the tiny connecter pins.

 

Yeah, it really doesn't matter which end ya test from.