POLARIZING THE ELECTRICAL SYSTEM
Whenever a generator or a generator regulator is tested, repaired, or replaced, the generator must be polarized. If this is not done, the generator may be damaged and the regulator contacts burned. Reversed polarity will discharge the battery - or damage it.
There are two types of generator and electromechanical voltage regulator combinations used with DC generators.
In an "A Circuit" system, the field is grounded through the regulator. "A Circuit" systems are found in most Ford and GM vehicles.
Most Chrysler vehicles had a "B Circuit" system which was grounded internally through the generator.
To polarize an "A Circuit" system, connect the FIELD, ARMATURE, and BATTERY leads to the regulator. Connect the battery. Then, momentarily connect a jumper wire between the ARMATURE terminal and the BATTERY terminal at the regulator.
To polarize a "B Circuit" system, connect the FIELD, and ARMATURE leads to the regulator. Connect the battery. Then, just before installing the BATTERY lead, momentarily touch it to the ARMATURE lead terminal.
VC and WC 1/2 ton military 4x4 Dodge trucks without radio set ups had 6 volt electrical systems with the POSITIVE battery terminal grounded.
WC 1/2 ton military 4x4 Dodge trucks with radio set ups had 12 volt electrical systems with the NEGATIVE battery terminal grounded.
The following 3/4 ton 4x4 Dodge trucks had 6 volt electrical systems: WC-51; WC-52; WC-54, WC-59; and WC-60, as did the 1 1/2 ton 6x6 WC-62 and WC-63.
The following 3/4 ton 4x4 Dodge trucks had 12 volt electrical systems: WC-53; WC-56; and WC-57.
All 3/4 ton 4x4 Dodge trucks and 1 1/2 ton WC models had the NEGATIVE battery post grounded
While the voltage was different - 6 volt vs. 12 volt, the steps to polarize the generator are the same.
The old generator with an electro-mechanical regulator is a rugged, versatile set up.
We can convert a POSITIVE Ground system to NEGATIVE Ground by changing the polarity of the battery and the generator; and switching the leads on the ammeter to show a charge when it's charging.
We can also increase the output voltage of a 6 volt generator and use an 8 volt battery by adjusting the voltage regulator. I know of folks who increased the voltage a bit more and use a 12 volt radio with an 8 volt system.
Automotive Electrical Systems, Classroom Manual and Shop Manual, Harper and Row Publishers
TM 10-1123/1443, Maintenance Manual, 1/2 Ton 4x4 Chassis, Dodge Trucks built for United States Army, Portrayal Press
TM 9-808, 3/4 Ton 4x4 Truck (Dodge), War Department
TM 9-810, 1 1/2 Ton 6x6 Truck (Dodge T-233, Models WC-62 and WC-63), War