ELECTRICAL SYSTEM AND TESTING
Electrical Circuits
2004 Precedent IQ System Golf Car Maintenance and Service Manual
Page 11-7
11
The following chart describes the function of each wire connected to the 16-pin connector at the speed con-
troller.
Tow/Run Switch Circuit
The Tow/Run switch performs the following function when placed in the TOW position:
1. Deactivates the vehicle’s control circuit through the onboard computer (OBC) white wire and the light
blue and gray wires of the speed controller.
The Tow/Run switch performs the following functions when placed in the RUN position:
1. Activates the vehicle’s control circuit through the onboard computer (OBC) white wire and the light blue
and gray wires of the speed controller.
2. Provides power to the key switch and the dash-mounted battery warning light.
3. Provides power to the MCOR limit switch through the key switch.
4. Provides power to the OBC yellow wire and the green wire of the speed controller through the key switch
and MCOR limit switch.
5. Provides power to the solenoid through the key switch.
6. Provides power to the reverse buzzer through the pink wire.
SPEED CONTROLLER 16-PIN CONNECTOR WIRE
FUNCTION
Pin 1 – White/Black (18-gauge)
MCOR potentiometer – positive
Pin 2 – Yellow (18-gauge)
MCOR potentiometer – slider
Pin 3 – Purple (18-gauge)
MCOR potentiometer – negative
Pin 4 – Open (No wire)
Pin 5 – Light Blue (18-gauge)
Solenoid lockout circuit – the OBC provides a +48 volt signal to
the speed controller when the battery charger is disconnected.
Pin 6 – Green (18-gauge)
MCOR limit switch – the limit switch pr48 volts to the
speed controller to turn the speed controller on when the
accelerator pedal is pressed.
Pin 7 – Orange/White (18-gauge)
The speed controller provides a ground to the reverse buzzer
through a transistor inside the speed controller.
Pin 8 – White (18-gauge)
FORWARD input from Forward/Reverse switch – The Forward/
Reverse switch sends +48 volts to the speed controller when the
switch is in the FORWARD position.
Pin 9 – Gray (18-gauge)
Tow/Run switch input to speed controller – The Tow/Run switch
pr48 volts to the speed controller when placed in the
RUN position.
Pin 10 – Tan (18-gauge)
Key switch input – The key switch pr48 volts to the
speed controller when the key switch is in the ON position.
Pin 11 – Open (no wire)
Pin 12 – Blue/White (18-gauge)
Solenoid coil – The speed controller provides a ground for the
solenoid coil after the accelerator pedal is pressed.
Pin 13 – Black/White (18-gauge)
Motor speed sensor – negative
Pin 14 – Light Green (18-gauge)
Motor speed sensor – output
Pin 15 – Red (18-gauge)
Motor speed sensor – positive
Pin 16 – Blue (18-gauge)
REVERSE input from Forward/Reverse switch – The Forward/
Reverse switch sends +48 volts to the speed controller when the
switch is in the REVERSE position.
