Where does this wire go? Found under oil filter.

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Mako21

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Can someone help assessing where this wire with terminal goes so I can plug it in? I have included a picture of it. It’s was routed along the passenger side fender and hanging next to the oil filter. Engine is a 1976 225 slant six.
Hopefully someone knows...thanks!!
 
Photo of wire

800E0C78-A266-48A7-96C5-9F1F9356683F.jpeg
 
What color is it? Might be brake warning light which connects to the center switch in the brake distribution block or proportioning valve if equipped.

You said pass side, ^^ might be, oil sender ^^
 
It is for the oil pressure indicator. It plugs onto the sending unit under where the Oil Filter is mounted. If you want to be certain, just ground the wire and see what dash light comes on.
-Matt
 
The insulation has become quite solid as is not very flexible. It seems to have a taken shape in the direction of the oil filter area, so I think you’re right it must plug into something around there. I’ll have to search better. Where exactly would the oil pressure indicator be located. At the rear of the filter ?
 
If you want to be certain, just ground the wire and see what dash light comes on
Never just ground a wire. Check for voltage on the wire first.

Others have suggested using a test light for this type of testing so you do not fry any wires.

It would be best for you to get a wiring diagram and trace it out by color and location.
 
In this shot, the finned aluminun thing is where the oil filter goes. Just below that, you can see the oil pressure sender with wire attached.
IMG_0181w.jpg
 
Gray wire with terminal for oil sender. Plastic insulator missing is typical. Replacement is available on line.
 
This forum is the best. I found where it plugs in and guess what? Now when I turn the switch to acc just prior to start, the red oil pressure indicator light works in the dash. Great!! Thanks to all.
 
Gray wire with terminal for oil sender. Plastic insulator missing is typical. Replacement is available on line.

Many did not have the plastic connector. The M&H harness for the a '65 was just the terminal no plastic.

Jim
 
Many did not have the plastic connector. The M&H harness for the a '65 was just the terminal no plastic.
Jim
So M&H didn't include the insulator for this terminal. That doesn't mean the factory didn't put on on it. I dont know the consequence of this terminal touching ground where there is only a warning lamp. Maybe just lamp stays on? I know shorted to ground can kill a oil gauge. There isn't a similar bare wire terminal anywhere else. There is my sign.
 
So M&H didn't include the insulator for this terminal. That doesn't mean the factory didn't put on on it. I dont know the consequence of this terminal touching ground where there is only a warning lamp. Maybe just lamp stays on? I know shorted to ground can kill a oil gauge. There isn't a similar bare wire terminal anywhere else. There is my sign.

yes the light just stays on. The early ones only had lights I believe so they could save a few pennies by not having the cover. The original harness on the 63 did not have a cover either.
 
My 63 Valiant never had a cover on the oil light wire, either. Nor did the 62 Polara 500 convertible my parents owned when I was a kid. One day, maybe 1963 or 1964, I was cleaning on the motor. Next time Dad started the car the oil light came on. Neither of us had any idea why. Took it to the dealer, guy reached back, hooked up the oil pressure light wire and - Presto! - it was fixed.

My 67 Barracuda has an oil pressure gauge, and it does have a plastic cover over the wire to the oil pressure sending unit.
 
At least slip heat shrink over the wire where the insulation is brittle. While in-there, if you may later change to an electric fuel pump, consider a 3-terminal oil pressure switch, as I did in my slant (SMP PN PS-64 switch). That can disable the fuel pump if oil pressure is lost, to both protect the engine and stop fuel flow after a crash. My slant engine has a bushing there for a 1/8-NPT switch, so I think the factory hole is 1/4"-NPT. Looks like I added the bushing, but forgot why, perhaps because my SB and BB Mopar engines have a 1/8"-NPT hole so could use the same switch.
 
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