Hey ford ranchero folks

Discussion in 'General Automotive Questions' started by lovemy78GT, Jul 12, 2017.

  1. lovemy78GT

    lovemy78GT In Second Gear

    Messages:
    36
    Location:
    Russellville Arkansas USA
    I have 78 ranchero. trying to locate what color wire is ground for fuel sending unit in tank. Fuel gauge works fine setting still but when you start moving gauge goes to empty. I'm hoping it's ground and not sending unit.
     

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  2. Cindy

    Cindy In Maximum Overdrive SILVER MEMBER

    Messages:
    1,138
    Location:
    Bay Area>>>>Gold Country, CA
    I had my sending unit changed out awhile back, but even now when I don't run Cochise for awhile, his fuel gauge shouts "screw you!" and quits workin until he calms down.
     
  3. FordR500GT

    FordR500GT In Maximum Overdrive

    Messages:
    1,050
    Location:
    Chaparral, NM
    The one on my '74 is yellow w/ black stripe. On the '72 and '73, it is just black
     
  4. lovemy78GT

    lovemy78GT In Second Gear

    Messages:
    36
    Location:
    Russellville Arkansas USA
    thank you. I'll take a look and see. Did research and found yellow/white is hot.
     
  5. 1978GT

    1978GT In Fourth Gear GOLD MEMBER

    Messages:
    259
    Pos is Yellow with White tracer, ground is Black.

    Fuel Sender Wiring 2017 0713.jpg
     
    rancheromac likes this.
  6. lovemy78GT

    lovemy78GT In Second Gear

    Messages:
    36
    Location:
    Russellville Arkansas USA
    Thank you for schematics. Looked the world over LOL. Question? both wires run to plug on sending unit. Can I take black wire and splice into it and run frame ground?
     
  7. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Messages:
    6,579
    Location:
    Everett, WA
    Yes, you can; if you do, a serrated-head bolt or a star washer with the bolt helps make a better ground.
     
  8. lovemy78GT

    lovemy78GT In Second Gear

    Messages:
    36
    Location:
    Russellville Arkansas USA
    Thanks.....glad it won't effect the gauge.
     
  9. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Messages:
    6,579
    Location:
    Everett, WA
    BUT, (and this is a big one like mine), you have to ensure the frame grounding is also solid at the battery, or it will cause problems.
     
  10. rancheromac

    rancheromac In Third Gear

    Messages:
    115
    what year is the schematic for ? where can I find these and more schematics for a 79 ranchero ? thanks
     
  11. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Messages:
    6,579
    Location:
    Everett, WA
    I went to the city library and copied a full set (actually, two full sets about 10 years apart) from one of their Chilton professional wiring diagram books, and the diagrams are Ford diagrams, which was a plus. If yours doesn't have anything like that in the reference section, let me know, and I could print and mail a set to you.
     

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