Oil pressure gauge problem
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Senior User
Joined: Mar 2002
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From: Florida East Coast
Oil pressure gauge problem
On my 89 302 Bronco. I replaced the sending unit today because my guage wouldn't move past the N in Normal. I have a mechanical guage also so I know what my pressure is. So the guage didn't move more into Normal than with the old unit. I ran the wire to ground to see if it pegged the needle but got the same result. I then ran a jumper wire to the connector on the fender thus bypassing the section of wire from the sending unit to the connector and got the same result. I was told that gauges rarely go bad. What else should I do?
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Joined: Jan 2008
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Oil pressure gauge problem
Hook up a testlight to the wiring connector to see if there is a current pulse.
If not go to the temp sending unit connector and check that.
But since the grounding out didn't peg the needle,I would think the Gauge is bad.
Gauges go bad all the time.
If you find pulsing electrical current in the connector:
I would think either the Gauge is bad or the sending unit is for a idiot light not a gauge There is a difference.
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If not go to the temp sending unit connector and check that.
But since the grounding out didn't peg the needle,I would think the Gauge is bad.
Gauges go bad all the time.
If you find pulsing electrical current in the connector:
I would think either the Gauge is bad or the sending unit is for a idiot light not a gauge There is a difference.
[b][i][font color=red]Dennis[/font][i][b]
[font color=red]Calgary,Alberta,Canada[/font]
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Need to decode your 78 Truck data plate? click here
http://www.clubfte.com/users/mil1ion/FordTruckCodes.html
[font color=red]If New Ford Parts Is What You're Cravin',
Then Buy Them HERE,At Motorhaven!
[/font]
Feel free to visit my website.
http://www.clubfte.com/users/mil1ion/Mil1ion.html
[font color =red] Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [/font]
[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon [/font]
Posting Guru
Joined: Jun 1999
Posts: 2,415
Likes: 3
From: Comox Valley, Canada
Oil pressure gauge problem
So no matter what you do, even touching the wire from the sending unit to a good ground, the guage only goes to the "N" in normal?
Well if all the other guages appear ok for their readings I would rule out the instrument voltage regulator. It very well could be a sticky guage, but first remove the connector on the back of the instrument panel and clean it. Then make sure it is seated tightly in the panel, same results and it sure sounds like the guage is failing.
Oh yeah you would know if you installed the wrong sending unit
If you put an idiot light sensor in a guage sytem as soon as the you turn the key on the guage will peg. Then when the oil pressure builds up the guage will drop to zero.
Just another note if you put a guage sensor in an idiot light system the light will come on then change brightness as the oil pressure builds up. Of course I have never done this that is just a theroy of mine.
Sparky
Well if all the other guages appear ok for their readings I would rule out the instrument voltage regulator. It very well could be a sticky guage, but first remove the connector on the back of the instrument panel and clean it. Then make sure it is seated tightly in the panel, same results and it sure sounds like the guage is failing.
Oh yeah you would know if you installed the wrong sending unit
If you put an idiot light sensor in a guage sytem as soon as the you turn the key on the guage will peg. Then when the oil pressure builds up the guage will drop to zero. Just another note if you put a guage sensor in an idiot light system the light will come on then change brightness as the oil pressure builds up. Of course I have never done this
that is just a theroy of mine.Sparky
