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Update: After testing the ground, sensor and ignition source wires I determined that had a non working gauge. There are two resistors on the gauge, one 75 ohms tested at 42 and 5 ohms tested at 5. Replaced the 75 ohm with no luck. Found a OEM new in box gauge on Ebay all is good now and...
Lawsoncl,
Yes there is full battery voltage at the sensor wire. Tested both on RUN/OFF and RUNNING. No difference full voltage at the sensor wire. At this point I am thinking that there is a bad connection to the gauge cluster, but not likely since ALL the other gauges are working but most...
Not entirely sure of perfect grounds on this old guy but will inspect and clean them, I checked and replaced the fuse as number 1 troubleshooting item. All of the other gauges are working perfectly. It's got that bulkhead connector if that is the c101 you reference? I cleaned out that bugger...
Green and everyone thanks for your responses. I thought about grounding the sensor wire but it is carrying full battery voltage 13volts + running so would I not see some sparks or burning up a wire, blown fuse etc.?
I did replace it with the correct sender a Wells PS 133 from Rock Auto which was the same part number I ordered a couple years ago when I broke off the terminal on the original, which worked fine until this last month. Just tested the resistance on the one that I replaced and 1 ohm @ 0psi is...
89 XJ 4L bone stock suddenly after a short drive last week the oil pressure gauge stopped moving, stuck at zero psi. Confirmed that I have adequate oil pressure with tester so guessing this is electrical. New sender and no change any ideas?
Tim is on track here. Just have a buddy run the wrench from above while you direct the socket onto the bolt head from below. A headlamp is good thing. If worried about dropping a bolt use a magnetic socket insert.