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  #16  
Old February 10th, 2018, 18:21
Jeff/Alaska Jeff/Alaska is offline
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Re: Oil pressure gauge

Grounded wire ignition ON no change or movement still sitting on 0.
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  #17  
Old February 11th, 2018, 04:48
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cruiser54 cruiser54 is offline
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Re: Oil pressure gauge

NOW, we're getting somewhere. Facts vs conjecture is always good.

Gotta find why the gauge isn't responding.

I'm not near a wiring diagram at the moment. Perhaps check online and look for a plug somewhere between the wire at the sender and the gauge.....
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  #18  
Old February 11th, 2018, 11:03
lawsoncl lawsoncl is offline
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Re: Oil pressure gauge

Quote:
Originally Posted by cruiser54 View Post
NOW, we're getting somewhere. Facts vs conjecture is always good.

Gotta find why the gauge isn't responding.

I'm not near a wiring diagram at the moment. Perhaps check online and look for a plug somewhere between the wire at the sender and the gauge.....
Sounds like either the gauge is not getting power, or the wire between the gauge and the sender is shorted to ground.
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  #19  
Old February 11th, 2018, 13:21
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Green Mesa XJ Green Mesa XJ is offline
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Oil pressure gauge

The gauge is not likely however these are 30 year old jeeps now.
Here is part of the diagram for the instrument cluster.


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  #20  
Old February 11th, 2018, 13:21
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Green Mesa XJ Green Mesa XJ is offline
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Oil pressure gauge




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  #21  
Old February 11th, 2018, 17:16
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cruiser54 cruiser54 is offline
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Re: Oil pressure gauge

Need to see "with gauges".
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  #22  
Old February 11th, 2018, 23:58
Jeff/Alaska Jeff/Alaska is offline
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Re: Oil pressure gauge

Thanks Green and Cruizer.
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  #23  
Old February 12th, 2018, 04:14
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cruiser54 cruiser54 is offline
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Re: Oil pressure gauge

C100 is the big bulkhead connector on the firewall side of the fuse box.

C105 is a flat 6 pin connector behind the battery. Light blue 20 gauge wire at terminal B.
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  #24  
Old February 12th, 2018, 08:32
lawsoncl lawsoncl is offline
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Re: Oil pressure gauge

Did you say you saw battery voltage on the wire going to the sensor with it unplugged? Voltage on the sensor wire with it unplugged would rule out a short to ground between the sensor and the gauge.
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  #25  
Old February 12th, 2018, 09:22
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Green Mesa XJ Green Mesa XJ is offline
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Oil pressure gauge

I should say the jeep trouble shooting book was for 1988, I believe Jeff/Alaska has a 1989. I think the difference will be slight.
He did say he cleaned out his bulkhead connector before, maybe there is a issue there.



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  #26  
Old February 12th, 2018, 09:47
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cruiser54 cruiser54 is offline
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Re: Oil pressure gauge

87 and 88 had the c101 connector and 89 and 90 did not.
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  #27  
Old February 12th, 2018, 23:41
Jeff/Alaska Jeff/Alaska is offline
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Re: Oil pressure gauge

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 likely is the gauge failed and suddenly.
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  #28  
Old March 10th, 2018, 17:42
Jeff/Alaska Jeff/Alaska is offline
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Re: Oil pressure gauge

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 working. Thanks for everyone's advise and your input.
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