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  1. F

    Electrical issues

    Isn't pushed in the normal off position for the 4-ways? In other words, sounds like it is working.
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    Wiring problems after a fire

    Here's a diagram. Hard to make out that one color on the tach sensor. Is it a tan/yellow and a darkgreen?
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    Bricknose Gusset Fun

    I think I would cut it so there was not much left, bend it so it would fit, and then take it out and weld it. That is going to take a lot of heat in the right places to just bend it without any cuts.
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    Cold timing advance problem

    I haven't run my cold advance system for 15 years now. Never understood what it did and saw no difference in making it work. I am sure it does something, I am suspicious it has something to do with emissions/smoke when the engine is cold.
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    1986 A/C-Heater air flow, not right

    The blend door is purely mechanical with a cable hooked directly to the temp lever, just like a lawnmower throttle. See if that actuator in your picture moves when you move the lever from panel to heat.
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    AC clutch won't disengage

    Cycling the clutch with the low pressure switch is how Ford controlled the cooling of the system. And it monitors the overall pressure in the system. So it had two duties. 1. How cold the evaporator is (the coil in the dash) is directly related to the pressure at the pressure switch...
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    Wiring problems after a fire

    The "A" terminal is the one that the alternator/regulator uses to determine the alternator output. If this wire does not have 12v on it, then the alternator/regulator will try to jack the output up trying to get that "A" wire to 14.5 volts. Once the alternator/regulator "A" wire has 14.5 volts...
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    Wiring problems after a fire

    The grey red is power from the PCM. I am guessing it's the 5v supply. If there is no power there, check the power to the PCM itself. It has a relay and some red wires feeding it 12v. Here's a diagram on that.
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    Wiring problems after a fire

    P.S. I think the last diagram above also has the pink/lightblue. Controls the A/C somehow. Looks like the fire got into right many of the computer wires.
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    Wiring problems after a fire

    This diagram also has a grey/red and a lightgreen/black. Looks like ***/red is the 5v power from the computer to the various sensors.
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    Wiring problems after a fire

    This diagram has a grey/red.
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    Wiring problems after a fire

    Here's a diagram with the red/lightgreen. It should have power if you turn the key to run. You could then keep checking power while you pulled on of the two fuses in the diagram below to possibly get a hint which red/lightgreen it was.
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    Wiring problems after a fire

    The diagrams for a 93 diesel show it using a alternator with the regulator built into it. So no external regulator. I can't see the 5 wires you are talking about in the picture.
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    any known steering querks for '89 F-350

    One quirk with all these 4x4 frontends are the axle u-joints. Even though you are not in 4x4 and the hubs are not locked(nothing is turning) the outer axle u-joints can still freeze up from rust and cause the steering to act funny. Balljoints can also rust and cause problems.
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    Ac newb questions

    Ester oil is used in conversions where there may be some old r12 oil still in the system. If your system is clean, you can use PAG. I have used ester in conversions, that comes in the conversion kits, with no problems. It's your choice.
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    Ac newb questions

    Since you are going to flush the system, then you can use Ester oil or PAG. I would look at your compressor literature. See what kind of oil comes with it or what they recommend. If it has some PAG in it, you might want to go that route. You have options since you are flushing the system.
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    1989 ZF542 on 7.3 Clutch Interlock

    Do you really need the switch? I would not bother with it.
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    Ac newb questions

    You need a vacuum pump and a set of gauges. The cheapest place for these is Harbor Freight. Once you check around to get someone to evacuate and fill the system, you will realize buying these few things at harbor Freight is cheap. Once you finish your work, you can put the vacuum pump on it...
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    Burning up fuel shut off solenoids.

    I have had DC coils burn up just like A/C coils. Without the metal plunger all the way up inside, they overheat, the windings melt together, and this creates a short circuit to ground which blows the fuse.
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    Burning up fuel shut off solenoids.

    If he has a spare good solenoid sitting on the bench, if he puts the metal plunger inside the coil and hooks it to 12v sitting on the bench, weeks later it will still be sitting there energized. Something is not letting the plunger (guts) of the solenoid enter completely into the windings of...
  21. F

    Oil Pressure Gauge reading way low

    You are on the right track, do not rely on the factory gauges. That goes for the temp gauge also.
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    Oil change for ZF-5 Transmission

    This is a old thread someone was reading and liked. I clicked on the alert and it came up. Did a lot of experimenting since 2011, it is now 2024, still have the same truck, and for past 10 years I have been running the Dexron VI in my zf. It is the best oil I have found for it, and what the...
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    DRW to SRW Pros cons discussion

    A "pickup" can be converted to a official dually "pickup" by simply swapping in a dually rear end from a dually "pickup". The dually pickup rearend is 4 inches wider, giving room for the dual wheels to the pickup frame. A "cab and chassis" dually rearend is different and won't fit. A cab and...
  24. F

    C6 overheating mysterious cause

    C6 transmissions puking fluid out is not a common problem with those. Something is wrong somewhere. While they are fuel hogs, they are good transmissions.
  25. F

    The rear tank doesn’t like to take fuel

    Not sure why that guy in the article had vacuum problems with his tank. I thought all modern fuel caps let air in, but not out. I ran into the same problem he did, not at the beginning, but later on when one of my hoses fell down. I filled the tank and some fuel got in the belly of the vent...

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