12V Gas Gauge Pegging?

deadzak · Posted: Mon Apr 18, 2011 8:07 pm Post subject: 12V Gas Gauge Pegging?

Hello All,

So I bought a refurbished 12V gas gauge. Once installed it wont stop pegging out. Any ideas why its doing this? and how do I get it read accurately?

Semper_Dad · Posted: Mon Apr 18, 2011 8:14 pm Post subject:

Take a resistance reading between your sender and ground
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Ea$y Money · Posted: Mon Apr 18, 2011 8:16 pm Post subject:

tstracy39 · Posted: Mon Apr 18, 2011 8:28 pm Post subject:

Assuming you have a 0-90 ohm VDO sender and not a Beetle or aftermarket VDO sender, your signal wire or sender is shorting out on the body/frame, or the float is jammed in the sender.
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Clara · Samba Member Joined: June 14, 2003 Posts: 12618

bad ground or bad sender.
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kokanee · Posted: Tue Apr 19, 2011 8:57 am Post subject:

My 67 was doing the same thing it was a bad groung

GDOG57 · Posted: Tue Apr 19, 2011 10:42 pm Post subject:

doctorsemaphore · Posted: Wed Apr 20, 2011 11:25 am Post subject:

Don't forget that the guage casing itself needs to be well grounded - as when it is properly installed in the dash with the metal bracket. At first I was testing the guage in my hand (with all the wires attached on the back) and it still wasn't working. Scratched my head a few moments, then AHHA - ground the guage, dude!

deadzak · Posted: Mon Apr 25, 2011 7:40 pm Post subject:

Thanks everyone for the input. The other day I was driving and the gauge started Jumping. Now its working but not consistently. Is it common for the gauge to be jumping around while you drive?

rking6 · Posted: Tue Apr 26, 2011 6:55 am Post subject: gauge

I have a 6v, with a new sending unit and mine jumps too,,,even when the car is sitting still... Hope there is an answer... Thanks Bob King Long Beach Ca,,,63 EZ camper ,,second owner...

EverettB · Posted: Tue Apr 26, 2011 9:30 am Post subject:

No, the gauge needle doesn't jump around, either while sitting still or while driving.

Sometimes I see it moving a tiny bit while driving but not bouncing around.
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Thomas Pedigo · Posted: Tue Apr 26, 2011 1:33 pm Post subject:

I have seen the needle "slam" from empty to full inadvertantly when the sender was connected or disconnected. It would only do it when the tank was full though. I replaced my rotton 10 gallon tank with a 15 gallon bay tank and only used the original sender to plug the top opening until I received a proper longer bay sender...
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