Gas gauge problem?
Senior User
Joined: Nov 2001
Posts: 444
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From: Cleveland
Gas gauge problem?
Just got mine to work this weekend. All I did was take off the molded rubber plug (has 2 wires coming out of it) off the sending unit and clean the contacts really good. This is where I would start with yours first.
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Gas gauge problem?
>The gas gauges don't work on my 79 F-350. It has dual tanks.
>Where do I start?
>
>Frank
To check the gauge with the key off:
Take the connector for the gas gauge sending unit off
put a cotter pin it, now attach it to a good ground,go back and turn the key to ON > If the gauge pins to the high side the gauge is good.
The problem is with the sending unit.
Sometime the connections get corroded and cause problems.
If the gauge DOESN'T pin, there is either something wrong with the gauge,wiring,or IC V reg.
To check the IC V.Reg with key ON:
Take a test light and attach it to the sending units wiring.
You should have a PULSING light.
If so, the I.C. V. reg is Okay.
If Not,either the wiring is bad or the V reg. is bad.
The I.C. V.reg is located on the back of the Instrument cluster.
Dennis
[font color =red]Calgary,Alberta,Canada [/font]
http://www.clubfte.com/users/mil1ion/Minimorleytruck.JPG
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[font color =green] 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]
>Where do I start?
>
>Frank
To check the gauge with the key off:
Take the connector for the gas gauge sending unit off
put a cotter pin it, now attach it to a good ground,go back and turn the key to ON > If the gauge pins to the high side the gauge is good.
The problem is with the sending unit.
Sometime the connections get corroded and cause problems.
If the gauge DOESN'T pin, there is either something wrong with the gauge,wiring,or IC V reg.
To check the IC V.Reg with key ON:
Take a test light and attach it to the sending units wiring.
You should have a PULSING light.
If so, the I.C. V. reg is Okay.
If Not,either the wiring is bad or the V reg. is bad.
The I.C. V.reg is located on the back of the Instrument cluster.
Dennis
[font color =red]Calgary,Alberta,Canada [/font]
http://www.clubfte.com/users/mil1ion/Minimorleytruck.JPG
[font color =green]http://www.clubfte.com/users/mil1ion/Mil1ion.html[/font]
[font color =green]http://community.webshots.com/user/mil1ion[/font]
[font color =green] 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]
