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Need experts on OLD trucks - 88 Ranger

Discussion in 'Ford Ranger - Mazda B-Series Forum' started by traveler, March 2, 2017.

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    1. Josh P

      Josh P Shaggin Wagon Elite Explorer

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      Nice looking truck, it is in good shape. The wiring for the windows and door locks runs from the doors along the back side of the fenders up along the front of the engine bay.
       
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    3. traveler

      traveler Elite Explorer

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      I'll look into that tomorrow, thanks. I did just remember the one other thing that is irritating to me. The gas gauge doesn't work. All the other gauges work, just the gas gauge doesn't. Any thoughts on what the most likely problem is. I'm leaning toward sending unit, though I really hope I'm wrong. Don't wanna drop the tank.

      I see you're from Phoenix. We're actually moving to that area this summer, sometime after school is out. (My wife works for a local high school)
       
    4. Josh P

      Josh P Shaggin Wagon Elite Explorer

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      The bed pulls off easier than dropping the tank. The supply wire to the sending unit is 5V, jump the supply and return wire. If the gauge jumps to full there is a problem with the sending unit, if it doesn't move then it could be a wire or the sending unit, maybe a bad gas gauge. If you do drop the tank to test the sending unit, full is 10 ohms and empty is 73 ohms.
      I've lived in Phoenix for 19 years, the lack of snow is why I stay.
       
    5. traveler

      traveler Elite Explorer

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      I'll consider raising the bed. It does seem like more than a one man job though. Any idea where I might find the supply wire? I traced the bundle of wires from the tank, and didn't find any connectors that might lead to the dash. I did find a two wire connector that led up to the floor of the cab, under the seats. I assumed that was for the seat belt buzzer.
       
    6. Josh P

      Josh P Shaggin Wagon Elite Explorer

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      The power wire for the sending unit goes to the instrument voltage regulator in the dash. Common symptom of the IVR failing is all the gauges will fluctuate. An EVTM can be bought off ebay for under $20. It has all the wiring and vacuum diagrams needed for troubleshooting.
       

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