Installation By Wire
Install BLACK Ground Wire(s)
The BLACK Ground Wires (#1 and #2 in diagram at right) are included in the four-wire Ford-style plugs on the PRIMARY
and SECONDARY wiring harnesses and are factory installed on regulator packages designated with “H” at the end of the
model number. The other end of the Ground Wire is fitted with a ring terminal con-
nector. In most applications, this wire can be connected directly to the alternator’s
ground terminal post. Both alternators and regulators must be connected to system
ground. Check continuity between primary and secondary alternator ground termi-
nals to ensure minimal resistance.
Install RED Power Wire(s)
The RED Power Wires (#3 and #4 in diagram at right) are included in the four-wire
Ford-style plugs on the PRIMARY and SECONDARY wiring harnesses and are
factory installed on regulator packages designated with “H” at the end of the model
number. The other end of the Power Wire is fitted with a ring terminal connector.
In most applications, this wire can be connected directly to the alternator’s positive
output post. When a diode-type battery isolator is used, the primary and secondary
power wires must be connected to the battery side of the battery isolator. Power
Wires are equipped with 15-amp ATC type fusing. PRIMARY and SECONDARY
wires must be fused.
Install BROWN Ignition Wire
The BROWN Ignition Wire (#5 in diagram at right) provides the ON/OFF voltage for
the regulator. This wire is included in the Ford-style plug at the regulator end of the
PRIMARY wiring harness. The other end of the wire is fitted with a butt connector.
Typically, the ignition wire is connected to the ON side of the ignition switch. This
may be at the actual switch, or to the wire in the existing engine wiring loom that
delivers switched voltage from the ignition switch. In some cases, an oil pressure
switch may be used to activate the regulator. In either case, the regulator’s ignition wire must see zero volts when the
engine ignition is switched off.
Only one ignition wire is required to activate the regulator.
Install BLUE Field Wire(s)
The BLUE Field Wires (#6 and #7 in diagram at right) provide regulated voltage to the alternators to excite the rotors and
stators and control alternator output. The wire is included in the wiring harness Ford-style plug and is pre-connected at the
regulator. At the other end of the wire, you’ll find either a plug or a ring terminal, depending on the alternator’s field termi-
nal connection. Attach the field wire to the alternator’s field terminal. Field
wires should be equal in length. See your alternator manual for any specific
requirements your alternator may have.
Install Alternator #1 Temperature Sensor
The optional Alternator Temperature Sensor (MC-TS-A) allows your Max
Charge voltage regulator to monitor your alternator for temperatures in ex-
cess of safe operating levels. The MC-TS-A sensor assmbly includes a 54”
cable, a sensing attachment lug and positive and negative regulator plug-in
connectors. To install the MC-TS-A:
1. Connect the sensor lug to one of the four bolts that hold the alternator’s
front and rear cases together. Extend sensor cable to the regulator. The
cable can be included within the regulator’s wiring harness, or can be
run alongside the harness and attached with cable ties.
2. Connect the positive and negative female connectors to the Alterna-
tor Temp. Sense terminals on the regulator (#8 is NEGATIVE. #9 is
POSITIVE). It is essential that the terminals match the polarity of the
regulator connection pins (red wire to positive terminal and black wire
to negative terminal).
- 4 -
2
1
3
4
5
7
6
