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Old 03-31-2012, 01:33 PM
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Still have gas gauge problems

I am having problems getting the gas gauge to work properly. This is a street rod and it was wired by someone else, so not sure if it was done properly. (Stewart Warner gauge 33 to 240 ohm. Sending unit the same ohm.)

I have disconnected the hot wire going to the gauge, connected a positive lead from the volt meter to that wire, connected the ground lead of the meter to a ground. I am getting 12 volts if the the key is on or off.

Isn't that supposed to be hot only when the key is turned on??

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Old 03-31-2012, 04:08 PM
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Connect to ignition ON.

Post the instructions for the sender. Can't find it on the net.

vicrod
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Old 03-31-2012, 05:23 PM
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Vic is right, you need to post the sending unit type/instructions, depending on your sending unit, you shouldn't have 12v from the wire going to the sending unit. The newer volume type sending unit does have a 12 wire going to the sender, but that's the only one I know of.
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Old 03-31-2012, 05:24 PM
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With the multimeter set to the 0-2k ohms scale, what do you measure from the negative post of the gauge to ground. This is with nothing attached to the + post and the tank sending unit attached to the = post. It should be less than 240 ohms and more than 33 ohms.

regards

Ron
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Old 04-01-2012, 09:09 PM
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New gas gauge fixed the problem

Since the gas gauge was 26 years old, I replaced that with a new one and everything seams to be working properly now. I did re-calibrate the float less sending unit when I installed the new gauge.
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Old 04-02-2012, 04:57 AM
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good to hear you got it working.
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