[68mustangguy]

can anyone please tell me how to wire my sending unit? i dont know if i run a wire from my sending unit to power then to the gauge or how it works.

 

[RF Mustang]

There are diagrams for the 68 posted on this forum in the threads above.

You should have a white/red wire running from your oil sending unit to one side of your oil pressure gauge. The other post on the gauge should have a black/white wire going to the constant voltage regulator mounted on the back of your instrument cluster

 

[68mustangguy]

what about the fuel sending unit do i run a negative wire from the sending unit to the gauge or a positive. where do i find wiring diagrams on here? sorry im new to this site, i do appreciate your help

 

[Print Dad]

Hello 68mustangguy,
FIRST - -welcome to the sight - you will learn a LOT here.

The wiring diagrams RF is refering to can be found pretty easy.
Open the MAIN page of this sight - - then go to the forums - -from there chose
the classic TECH section.
At the top of this section - -you will see a THREAD for diagrams. It sits just above the
solid bar. I think you will find it and in time you will understand better and easier just takes a little getting used to.

As for your issue - -WHAT are you trying to do?
Are you replacing a FUEL sending unit that already has wires or are you
re-wiring a car? It would make helping a LOT easier.

The sending unit for the FUEL is located inside the tank on a factory set-up.
The hot wire will be there and the ground is through the tank into the frame.
So one wires (hot) feeds the sending unit and the unit grounds to the car IF this
is a factory set-up.
If doing a complete re-wire - -need to refer to the diagrams

Let us know
Print Dad

 

[68mustangguy]

the guy i bought the car from cut wire and ran them every else besides where they are suppose to go. so can i run a wire from the sending unit to power to the gauge?

 

[RF Mustang]

Be safe and follow the wire diagrams posted on the forum threads at the top of the Classic tech forum.

You will have one wire running from your constant voltage regulator (same as wth oil gauge) to one side of your fuel gauge. The other side of the fuel gauge is connected to a wire that runs all the way back to you fuel tank to the sending unit.

New under dash harnesses are expensive. If you do buy one, make sure it is the one made by "Alloy Metal Products". I've had to help friends correct wiring mistakes on the ones made by Mr. Mustang. You can also search ebay for a used one.

You might be able to get a "refurbished one" from Randy at Mid life Harness restorations. here's his contact info

Randy Jacobson
Midlife Harness Restorations
2316 E. 9th St.
Lynn Haven, FL 32444
850-248-1967
[email protected]​

 

[Al Newman]

All Mustang gauges are wired with the sending unit containing the ground circuit wire. Power is provided to the gauges via the constant voltage regulator. The gauges then ground to the sending units, which act as grounding modifiers.
Best,
Al

 

[68mustangguy]

thank you everyone