There isn't one. There'll be a fuse for the HVAC blower, but the heater itself doesn't use electricity (other than the blower fan). That year Ranger should have cables going to the blend door, so there won't be electricity there.
In my 94 ranger ext cab, it's under the dash on driver's side
look in the owner's manual for any `94 ranger, or buy and inexpensive automotive repair manual for ford rangers.
4x4 dash lights not working 94 ranger
If it's like the 1994 Explorer the turn signal and hazard flasher " cans " are in the fuse panel
I found a fuse box diagram for 91-94 Ford rangers on Autozone.com, small print and hard to read though.
is a 95 automatic 4cyl ford ranger transmission compatible with a 94 ranger 4cyl?
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fuse location 7
Yes , the 1994 Ford Ranger has fuel injected engines
If your heater does not work on your 94 Mazda Protege, check the thermostat. You can also check the heater fuse to ensure it has not blown.
Where is the crank sensor located on a 94 ranger 4.0 motor
No it is not.