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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

Need help with electrical problem

Old Nov 5, 2015 | 11:21 PM
  #1  
No1rascal's Avatar
No1rascal
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Question Need help with electrical problem

Hello to everyone, newbie with first post. Recently acquired a 61 f100 shortie project & need some help with a strange electrical issue.

I started looking into why the fuel gauge wasnt working. Found that on the lead on the gauge that connects the orange wire to the float has a pulsating current to it, same for the temp gauge. I have no idea where a pulsing current would come from.

Any ideas, suggestions, or info would be most appreciated.

I did order a color wiring diagram so hopefully that will help with some of the trucks wiring issues.

Thanks
Scott
 
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Old Nov 5, 2015 | 11:53 PM
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Tedster9
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Welcome to FTE!

The pulsing voltage is normal. It's coming from just behind the gauge cluster, a little charmer called the ICVR, or Instrument Constant Voltage Regulator.
 
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Old Nov 6, 2015 | 04:25 AM
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Scott Welcome to and the Slicks Forum.

Hopefully the guys here will help get your issue solved shortly.


John
 
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Old Nov 6, 2015 | 07:29 AM
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hiball3985
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From: tujunga, calif
Start by taking the wire off of the tank sending unit and use a jumper or similar to ground the wire, when grounded the gauge should go to FULL. If it does the problem is in the sending unit or float that has sunk.
 
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Old Nov 6, 2015 | 11:53 AM
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Thanks guys, never would have thought it was normal.
 
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