Will do

 

I have continuity on pin 7 unplugged to sw/leg of sensor..
ground shot where to where?
Power shot, same question.
Also, with ipc plugged in, continuity thru cluster to test pins

 

You unplug the wire that connects the sensor to the IPC at both ends:

Measure resistance between both ends of the now open wire

Measure the resistance between the IPC end of the totally unconnected wire to ground

Measure the voltage from the IPC end of the totally open wire to battery ground.

What was the result of grounding pin 7 on the IPC?

George

 

Open resistance on both ends of tan wire, unplugged..
.1v to .2v at open end of ipc sensor wire, tan. And zero on sensor end

 

This may help, especially paragraph 4:

https://blazerforum.com/forum/2nd-ge...29/#post731395


George

 

I didn't see your update before posting that article link.

If I understand you correctly you unplugged the tan wire that connects the OP sensor to pin 7 on the IPC at both ends and then measured the resistance between both open ends of that isolated wire and got a reading of infinite ohms (sometimes a "1" on the meter)? If so, go find the break or corrosion in that wire, repair it and use the existing sensor.

What was the result of ground pin 7 of the IPC with the fused wire?

George

 

I have continuity on tan wire from ipc connection to op sensor.
fused wire where to where, Distributor is out, sensor access available

 

Ive grounded it w/out sensor plugged in...

 

Ground pin 7 of the IPC through a 3A fused wire and see if the oil pressure gauge now reads zero. If so, the IPC is good.

Now measure the resistance in ohms of the unplugged OP sender first with the engine off and at idle. You should read low or zero ohms off and tens of ohms at idle.

Test the wire. I updated paragraph 4 with pictures:

https://blazerforum.com/forum/2nd-ge...29/#post731395


George

 

New oil pressure sensor in hand, will check all u have said do this weekend. And thanx 4 ur time and input, gratefully appreciated. Signed, wits end