How to wire up 1975 Ford Courier Alternator w/external regulator?

Internally regulated Ford alternator will have a three wire plug and a single wire plug next to it. Plus the battery stud. The regulator is normally black or gray in color mounted on the back of alternator. The three wires plugs to the regulator. Externally regulated will not have these plugs. Hope this is helpful.

Jorge, You probably have an alternator on that truck,which means the regulator is built into it. Check the attached links,instruction and guides, Good luck

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Sounds like your still running power thru the original regulator also. Disconnect the original system completely so that your running power directly from alternator's inboard regulator and to the battery. Nowhere else.

Hi, some models may have an external regulator. Check with your local parts chain to verify you do not have an external regulator. If you do, it is probably fried.

IDENTIFICATION

There are 4 different types of alternators found on the years and model ranges covered in this information:

1. Rear Terminal, External Regulator, External Fan Alternator
2. Side Terminal, Internal Regulator, External Fan Alternator
3. Leece-Neville 165 Ampere Alternator
4. Integral Rear Mount Regulator, Internal Fan Alternator

Rear Terminal, External Regulator, External Fan Alternator
This unit utilizes a separate, external electronic regulator. The regulator is non-adjustable. The rear terminal alternator was standard equipment on 1987 trucks, and can be found on some 1992 motor home chassis models equipped with the 7.3L diesel or 7.5L gasoline engine.
Side Terminal, Internal Regulator, External Fan Alternator
This unit was optional on 1987, standard on all 1988-92 models and standard on 1993-96 models equipped with the 4.9L and 7.5L engines. The regulator in integrated within the alternator body and is not adjustable.
Integral Rear Mount Regulator, Internal Fan Alternator
This alternator is standard equipment on all 1993-96 models equipped with 5.0L, 5.8L gasoline engines and 7.3L diesel engines (except the 1996 F-Super Duty models).
Leece-Neville 165 Ampere Alternator
This unit is optional equipment on some 1989-94 trucks and ambulance packages. A separate, electronic, fully adjustable regulator is employed in this system.
Mitsubishi 215 Ampere Alternator
This unit is found on 1996 F-Super Duty models equipped with the 7.3L diesel engine. The regulator is integral and the fan is external.

REMOVAL & INSTALLATION

See Figures 1, 2, 3 and 4

Fig. Fig. 1: Disengage all wiring harness connections from the alternator

Fig. Fig. 2: Once it is unbolted, maneuver the alternator from the engine compartment

Fig. Fig. 3: Side terminal alternator

Fig. Fig. 4: Rear terminal alternator

1. Disconnect the battery ground cable.
2. Remove the adjusting arm bolt.
3. Remove the alternator through-bolt. Remove the drive belt from the alternator pulley and lower the alternator.

Some engines are equipped with a ribbed, K-section belt and automatic tensioner. A suitable tool must be made to remove the tension from the tensioner arm. Loosen the idler pulley pivot and adjuster bolts before using the tool..

1. Label all of the leads to the alternator so that you can install them correctly and disconnect the leads from the alternator.
2. Remove the alternator from the vehicle.
3. To install, reverse the above procedure. Observe the following torques:
   
   Pivot bolt: 58 ft. lbs. (78 Nm) Adjusting bolt: 25 ft. lbs. (34 Nm) Wire terminal nuts: 60-90 inch lbs. (6.8-10.1 Nm)
   

VOLTAGE REGULATOR IS LOCATED BEHIND BATTERY.YOU PROBABLY MIGHT HAVE TO REMOVE BATTERY TO REMOVE THE VOLTAGE REGULATOR.

Jump terminals A to F and the alternator should full field and charge. If it charges then replace the regulator. if it doesn't charge replace the alternator. I remember the terminals by thinking of the word AIR FORCE .

where did you buy the new alternator? Are you sure the alternator is good? Have the alternator tested before you spend time/money on your other components. If your wires are damaged or corroded, that's another problem.

That indicator is commanded by a relay connected to the alternator. Check the wires and the relay. Or it may be just a burned bulb.