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Classic/Antique Car Repair/69 Mustang fuel guage

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Expert: - 12/31/2009


Question
I took the dash off to repair a rusty lower cowl. After the repair I installed new printed circuit and led lights in dash. I have bolted up the dash and the fuel gauge is not working. The fuel tank is new and it is connected. Is there a ground that I missed? The oil and temp are run to a pod on the console.

Answer
The fuel gage is grounded by the fuel gage tank unit. Time to get a voltmeter and make sure that there is voltage getting to the fuel gage dash unit. There is a device on the back of the dash called a constant voltage regulator that sends a constant 5 or so volts to the gas gage. Check and make sure that is connected and is getting full battery voltage when the key is on.
Brad

Classic/Antique Car Repair

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Brad Sears

Expertise

All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.

Experience

Automotive tech instructor. Syndicated auto columnist 1970's though the early 1990's. Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's TV Show "Last Chance Garage" 1980's PBS-TV syndicated. Auto instructor for the following companies: Fram Autolyte Holly Carter AMF Ford Motor University Of Conn Blue Hills Technical School Sugar River Technical Center Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.

Publications
Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.

Education/Credentials
More than I care to remember. Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.

Awards and Honors
Moto Award winner. And much more.

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