2001 Ford Explorer Sport wont start

4WD not working on 2001 explorer sport

Ford-Trucks.com https://www.ford-trucks.com > forums > 1211319-4w...
Dec 21, 2012 - I had a similar problem with no response from 4x4 toggle (2004 Sport Trac), but fuse was blowing. Turned out to be the 4x4 transfer case shift ...

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2001 Sport Trac 4x4 does not engage.

Explorer Forum https://www.explorerforum.com > forums > threads
Mar 23, 2020 - First try unplugging the module and cleaning with contact cleaner and plugging back in a few times and see if that helps. That trick didn't work for me but it's ...

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Battery cables ! Do you know what voltage drop testing is ? Starter Voltage Drop

I'm not sure if you have all of the info you need to go forward with this.
The battery may be rated for 800 amps but could have less than 12 volts if the alternator is not charging it.
It could have a dead cell which would keep it from holding a charge.
You would need to check the charge of the battery with a volt meter, then see if the alternator is charging at 14 volts when the engine is running. The battery should be at least 12 volts with the engine off.
The problem could be in the wiring from the key switch or dash gauges back to the alternator.

maybe a busted timing belt

sounds like the battery is dead. Try recharging the battery or try jump starting from another vehicle using jumper cables.

check what the diagnosis machine will give if there is no data then check if the starter crank sensor is getting any power

have the battery tested if battery is good and charged theni would say you have a bad starter.

Sounds to me like it's a battery issue. Take your battery to Autozone, Checker, basically any auto parts store and have them do a test on it. More than likely a dome light or something simple like that was left on and it just drained the battery.

Sounds like the starter drive is shot, best thing to do is replace starter with new or rebuild.