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05-22-2015, 04:58 AM | #1 |
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Location: central nj
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1940 ford resistor
does the resistor under the dash have anything to do with the function of the gages,my gages always worked but all of a sudden are not working correctly.
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05-22-2015, 05:21 AM | #2 |
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Re: 1940 ford resistor
No, it is an ignition resistor only, 6 volt to 4.5 volt to coil. Check your grounds, that is the most common problem. Add a temporary ground wire and see it that helps, then you can go to each item and clean connections.
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05-22-2015, 03:14 PM | #3 |
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Re: 1940 ford resistor
thanks, tightened the grounds,all gages except fuel gage work, fuel gage goes from empty to past full, tried a new sender from drake no change.
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05-22-2015, 03:30 PM | #4 | |
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Re: 1940 ford resistor
Quote:
Another test is to remove the wire from the gauge to the sender at the sender. With the ignition on and the wire removed the gauge should read empty, now at the sender end short the wire to ground and with the ignition on the gauge should read full (only do this for a short period of time as it can damage the gauge if left shorted for an extended period). If the gauge checks ok this way but goes to full when connected to the sender, there may be a short in the sender wire. Last edited by JSeery; 05-22-2015 at 03:56 PM. |
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05-22-2015, 06:27 PM | #5 |
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Re: 1940 ford resistor
My fuel gauge in my Mustang wasn't working so I took the wire off at the sender in the tank and shorted that out with a jumper wire. The gauge moved to full when I turned on the ignition (as JSeery says). If that works its your sender that is is stuffed.
GB
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05-22-2015, 06:45 PM | #6 |
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Re: 1940 ford resistor
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05-22-2015, 08:26 PM | #7 |
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Re: 1940 ford resistor
no,still 6 volts, sender is a bob drake unit,put in by the previous owner.
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05-22-2015, 08:50 PM | #8 |
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Re: 1940 ford resistor
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05-22-2015, 11:10 PM | #9 |
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Re: 1940 ford resistor
The original sending unit operated in a very different manner than the aftermarket unit made currently. There are multiple forum topics in that regard. In short, if you are 6 volt, you should use an original sender. Many of my customers have found that the aftermarket units are inaccurate and they can damage the gauge.
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05-23-2015, 05:51 AM | #10 |
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Re: 1940 ford resistor
I agree, I will look for an original, and contact you about checking it out or rebuilding it if needed. thank you
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