4x4 question

[Dr.TnK]

Hi All,

I'm new to 4x4. Just bought a 94' Ranger 4x4 Automatic with locking hubs. The cluster has a "4x4" and "low range" button. When I test drove it I put it in neutral and pressed the low range button it showed up on the dash and the truck went into low range. Well I got home and put it up on 4 jack stands to verify 4x4 was functional. "4x4" button works fine. All 4 tires spin. But for some reason now the low range button doesn't do anything. Dash light won't illuminate and the truck does not switch into low range, only the back tires spin. Is this abnormal? Or does the truck need the weight on the suspension and friction of the tires to activate low range. Would love to hear everyone's thoughts.

I am planning to do an overhaul on all the 4x4 components so if you have suggestions on what to look out for/replace or any tips/tricks on getting it restored I would love to hear them

 

[bobbywalter]

wiggle the wires

 

[SenorNoob]

IDK if this makes any sense or not, but is it possible that without tension the shifter motor overruns and doesn't actually stop where it should?

 

[Dr.TnK]

Tried this on the switch wiring, didn't work. I took off the dash bezel and removed the 4x4 switch. The plug into the switch looks like the picture below. Terminal 8 in the picture shows ZERO voltage for me. Terminal 7 does show battery voltage.

I'm at an awe. How could simply driving the truck 20 miles home cause a wiring gremlin. Anyone have a wiring diagram of the 4x4 so I can trace back and try to find the issue? My Haynes manual doesn't have it.

 

[SenorNoob]

I suspect these are where you got the previous picture but,

therangerstation.com/tech/ford-ranger-4x4-module-diagnosis-1994-older/

Checking 4WD Shift Module Circuits (1994-Older) - The Ranger Station

There are three wiring connectors connected to the electronic control module: the eight-wire pigtail harness connector; the five-wire harness connector; and the eight-wire harness connector. To check the integrity of these circuits, disconnect the harnesses from the electronic control … Continued

www.therangerstation.com

Transfer Case Troubleshooting - The Ranger Station

Are you having trouble with the transfer case in your 1983-2011 Ford Ranger 4x4? Here's how to troubleshoot it and find the problem.

www.therangerstation.com

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[Dr.TnK]

I suspect these are where you got the previous picture but,

therangerstation.com/tech/ford-ranger-4x4-module-diagnosis-1994-older/

Checking 4WD Shift Module Circuits (1994-Older) - The Ranger Station

There are three wiring connectors connected to the electronic control module: the eight-wire pigtail harness connector; the five-wire harness connector; and the eight-wire harness connector. To check the integrity of these circuits, disconnect the harnesses from the electronic control … Continued

www.therangerstation.com

Transfer Case Troubleshooting - The Ranger Station

Are you having trouble with the transfer case in your 1983-2011 Ford Ranger 4x4? Here's how to troubleshoot it and find the problem.

www.therangerstation.com

[

That first link is gold. Thank you I will try some troubleshooting tomorrow