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post #1 of (permalink) Old 05-22-2007, 09:28 PM
Wildcatbadass
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Exclamation cj 7 fuel sending unit Q

hey guys pretty simple question. Ive got a 1985 cj 7 that ive rebuilt and my fuel gauge/sending unit is not working.Ever since I bought the jeep it hasn't worked. So i look to take my sending unit out and I see there are two wires to/from it. One looks to be the feedback directly to the gauge and the other Im unsure of. It has been cut. Does anyone know if its a ground? I would assume so but wanted to make sure before I go about testing whether the sending unit is bad or if its just a gauge gone bad. Your imput would be great guys. thanks
Billy
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post #2 of (permalink) Old 05-22-2007, 10:50 PM
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post #3 of (permalink) Old 05-22-2007, 11:41 PM
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wow, thanks LEVE. I feel really dumb now haha but thank you very much.
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post #4 of (permalink) Old 05-23-2007, 07:32 AM
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Originally Posted by Wildcatbadass View Post
wow, thanks LEVE. I feel really dumb now haha but thank you very much.
Wild

Don't apologize. Everyone in here, EVERYONE, started out asking the same "dumb" questions. Some of them might have started a hundred years ago, but everyone had their "dumb" stage. Unfortunately some of us seem to have forgotten that. Good luck with the fix.
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post #5 of (permalink) Old 05-23-2007, 09:42 AM
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Real quick note....
The ground for that should attach to the frame cross member right there in front of the gas tank.

Before you shove the sender back in the tank...hook up the two wires and verify it works. As long as the ground is hooked up, it will work as if it was in the tank.

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post #6 of (permalink) Old 05-25-2007, 10:38 AM
 
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This is Wildcatbadass its my new name. Anyways I wanted to point out something about the speedometer cluster. The posts for both the fuel and temp gauge have very little protection from the grounded case of the speedometer cluster. When removing these for replacement you need to pay attention so that the none of the gauge posts are touching the grounded case. That was ultimately my problem with my gauges. Hope it may help someone in the future.
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post #7 of (permalink) Old 05-26-2007, 07:01 PM
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Good advice! Best thing to do is disconnect the battery any time you're working in the vicinity of electricals. It's ironic that one of the most common problem with old Jeeps is that they get rusty and the ground connections go bad. UNLESS a good ground will burn something up.

EVERYTHING's easy for the guy who doesn't have to do it.
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post #8 of (permalink) Old 05-26-2007, 07:20 PM
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Quote:
The ground for that should attach to the frame cross member right there in front of the gas tank
Just a note... run a seprate ground wire from the dash, and hardwire it to the sender assembly. Don't depend on chassis ground at the tank. That's where lots of fuel guage problems start.
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post #9 of (permalink) Old 05-26-2007, 09:06 PM
 
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Originally Posted by LEVE View Post
Just a note... run a seprate ground wire from the dash, and hardwire it to the sender assembly. Don't depend on chassis ground at the tank. That's where lots of fuel guage problems start.
Very true. I ended up grounding my dash and the speedometer cluster. You can use one of the screws that hold in the speedometer.
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