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Wiring Help Needed!

  • Thread starter Thread starter central_texan
  • Start date Start date Dec 6, 2017
C

central_texan

Member
Apr 8, 2016
24
0
13
Fredericksburg, Yexas
Dec 6, 2017
#1
  • Dec 6, 2017
  • #1
Hello All,
I am nearing completion of restoration of a 1968 Mustang Fastback. The PO cut the wires running down the passenger side of the car to the trunk area. I found remnants of a harness elsewhere in the car (disconnected) that I THINK is the missing part but I need to be sure. The remnant consists of two wires. The first is either light yellow or white and I think it is the fuel level connection. The other wire is black with a white or blue stripe and I think it is a connection to the courtesy lights from which the trunk light receives it's power. I would appreciate it if someone could confirm that the wires are what I think they are. I have studied the wiring diagrams and can find no reference to the wire going back to the fuel level sending unit. Thanks in advance.
 

tos

Founding Member
Apr 27, 2001
896
68
59
Cincinnati Ohio
Dec 8, 2017
#2
  • Dec 8, 2017
  • #2
Black with blue IS a courtesy light color code and yellow IS a fuel level color code so as long as your brake lights are still wired (probly down the drivers side) then I think you've got it.
 
I

ILFC

New Member
Dec 1, 2016
2
0
1
Apr 29, 2020
#3
  • Apr 29, 2020
  • #3
Don't mean to bring up and old feed, but wondering if you figured out the yellow wire with the white stripe on the passenger side? I also thought it was for the fuel sending unit, but the more I read about the sending unit it looks like it comes down the drivers side and crosses over the tank and through the grommet on the passenger side.

Appreciate your help.

central_texan said:
Hello All,
I am nearing completion of restoration of a 1968 Mustang Fastback. The PO cut the wires running down the passenger side of the car to the trunk area. I found remnants of a harness elsewhere in the car (disconnected) that I THINK is the missing part but I need to be sure. The remnant consists of two wires. The first is either light yellow or white and I think it is the fuel level connection. The other wire is black with a white or blue stripe and I think it is a connection to the courtesy lights from which the trunk light receives it's power. I would appreciate it if someone could confirm that the wires are what I think they are. I have studied the wiring diagrams and can find no reference to the wire going back to the fuel level sending unit. Thanks in advance.
Click to expand...
 

wicked93gs

15 Year Member
Sep 30, 2006
1,198
228
93
Nashville TN
Apr 30, 2020
#4
  • Apr 30, 2020
  • #4
ILFC said:
Don't mean to bring up and old feed, but wondering if you figured out the yellow wire with the white stripe on the passenger side? I also thought it was for the fuel sending unit, but the more I read about the sending unit it looks like it comes down the drivers side and crosses over the tank and through the grommet on the passenger side.

Appreciate your help.
Click to expand...

That is how the sender wiring is routed(no clue why) but it is the sender wiring for sure...people often cut it because the grommet is attached to the wires and is a real bear to pull and push through the area below the sill plates if removing or installing a harness.
 
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