Can 't find the high amp fuse that supposedly can stop the alternator from recharging. Anyone know where this fuse is located?

From what I know about it you crank the car with the battery. When the car cranks the alternator supply's voltage to run your car and recharge the battery. I would think your alternator is working all the time your car is running. If you think it is not take the negative cable off the battery that way the alternator is the only voltage supply. If your car shuts down you know there is a issue with the alternator. Measure voltage with the cable off battery that will tell you what your alternator is putting out.

There are three fuses involved.
There is a 25 amp fuse before the brake switch located in the fuse box under the hood. Then there are two 15amp fuses after the brake switch in the box inside the cabin. One is for the lower brake lights and the other is for the high mount light and the trailer connector.
You would need to know if the 15amp fuse for the lower lights has power when the brake pedal switch is applied.

This may not be helpful, as I have not done one on that car

I see all sorts of info on the internet

You know that it is driven by one belt,
& while you may not see it,it is on the front
of the motor & according to what I read,
seeing it isn't the problem

Moving the radiator shroud,fender covers,etc
& clearance to remove a bolt or two may be

It in the engine fuse junction box it is the 100 amps. Listed as Main. Then you have a 30 amp listed as fuel injection.

This is easy to test but you need a multimeter. Connect the multimeter to the battery and run the engine at a fast idle (say 2000 rpm). You should get a voltage reading anywhere from 14 to 15 volts if the battery is fully charged and the alternator is working. If the reading is around 12 volts, then the alternator is not working.

A discharged battery should be recharged with an external battery charger--about 2 to 3 hours with a high-current (10 to 30 amps) charger, overnight with a low-current charger (2-4 amps). Check the battery voltage after charging and the engine running--it should read about 13.5 volts if the the alternator is working. It will read 12.6 or less volts if the alternator is bad, or the fuse link is blown in the wire that runs from the alternator output to the starter solenoid connection where the positive battery cable is connected. Once the battery is charged, take the car to Autozone or similar business that will provide a free check of the battery and charging system if you don't have access to a voltmeter. Hope this helps!

For Audi A4 the fuse box is located on the left side of dashboard behind a plastic cover (for left hand steering wheel vehicle). On inner face of the plastic cover you will find the fuse diagram.
First fuse on first row from left upper corner is Fuse Nr.20 = F20 (15A) - RH headlamp low beam, headlamp adjustment.
First fuse on second row from left upper corner is Fuse Nr.21 = F21 (15A) - LH headlamp low beam, headlamp adjustment.

Checked Every fuse in the fuse box (no small task).This includes #4 - Power point Instrument Panel, #14 - Day time running lamps (auto lamps doesn't work nor does auto lock), #27 - ignition switch run feed, #35 - Instrument Cluster, #41 - Instrument Cluster, #42 - Delayed Accessory, #45 - Ignition switch run/start feed, #102 - Door locks body security module, #103 - Ignition switch, #110 - Ignition switch, & #116 - Ignition switch. But I also check all other ones as well, they all register OK. AC panel & radio work. Turn signals work. Mileage does not work, trip computer does. So, basically, everything works except auto head-lights, auto locks, and the dash cluster (no MPH, RPM, mileage display, Fuel, Temp, Tran Temp, and Oil Pressure).

Regulator in alternator obviously faulty, have it bench tested & fixed or replace alternator, and cure your problem.

owner manual.

here's the big ones for 1994 ranger. all i have
Section 18-01: Wiring and Circuit Protection 1994 All Ranger, Explorer and Aerostar Vehicles Workshop Manual
SPECIFICATIONS Specifications

High Current Fuses And Circuit Breaker — Ranger 2.3L, 3.0L And 4.0L
Circuit Size Location Electric Fuel Pump 20 Amp Fuse Power Distribution Box Headlamp Switch Feed 40 Amp High
Current Fuse Power Distribution Box #36 Circuit Alternator Output #2 15 Amp Fuse Power Distribution Box Fuse Panel 60 Amp High
Current Fuse Power Distribution Box Power Locks 20 Amp High
Current Fuse Power Distribution Box #38 Circuit Alternator Output #1 12 Ga Fusible
Link Integral with 14305 W/A Powertrain Control Module and Power Relay 30 Amp High
Current Fuse Power Distribution Box 4x4 Electric Shift 20 Amp High
Current Fuse Power Distribution Box Ignition Switch Feed 60 Amp High
Current Fuse Power Distribution Box High Beams and High Beam Indicator 22 Amp C.B. Integral with Headlamp Switch Front Wiper and Washer 6 Amp C.B. In Fuse Panel Power Windows 30 Amp C.B. In Fuse Panel Cigarette Lighter, Flash to Pass and Power Lumbar 20 Amp C.B. In Fuse Panel