Club Car Precedent 2014, Maintenance And Service Manual

Page: 236 / 548

17
External Motor Testing MOTOR (MODEL EJ8-4001A): ELECTRIC VEHICLE
MOTOR TERMINALS CONTINUITY TEST
RESULT
A2 to F1
A2 to F2
No Continuity
A1 to Ground
A2 to Ground
No Continuity
F1 to Ground
F2 to Ground
No Continuity
TEST PROCEDURE 1 – Internal Short Circuits
See General Warnings on page 1-2.
1. Place vehicle on a level surface.
2. Disconnect the batteries and discharge the controller. See Disconnecting the Batteries – Electric Vehicles,
Section 1, Page 1-4.
3. Disconnect wires from terminals on motor using two wrenches to prevent posts from turning.
4. With a multimeter set to 200 ohms, place black (–) probe on motor housing. Scratch through paint to ensure a
good connection. Place red (+) probe on A1, A2, F1, and F2 terminals respectively while rolling the vehicle slowly
to rotate the armature. Multimeter should indicate no continuity between the motor housing and all individual
terminals. If readings indicate continuity, motor will need to be removed from the vehicle and repaired by a
qualified technician.
See Motor Removal on page 17-4.
4.1. An incorrect reading from the A1 or A2 terminal indicates three possible problems: a grounded A1 or A2
terminal, a grounded wire in the brush area, or a grounded armature/commutator. An incorrect reading for
the F1 or F2 terminal indicates a possible grounded F1 or F2 terminal or field coil.
5. If readings are correct, reconnect the motor wires. See Motor Installation on page 17-15.
6. Connect the batteries. See Connecting the Batteries – Electric Vehicles, Section 1, Page 1-4.
TEST PROCEDURE 2 – Armature Circuit Open
See General Warnings on page 1-2.
1. Disconnect the batteries and discharge the controller. See Disconnecting the Batteries – Electric Vehicles,
Section 1, Page 1-4.
2. Disconnect wires from the A1 and A2 terminals on the motor using two wrenches to prevent posts from turning.
Set a multimeter to 200 ohms and place the red (+) probe on the A1 terminal and black (–) probe on the A2
terminal. The multimeter should indicate continuity. If the reading is incorrect, a possible open or poor contact in a
brush assembly and/or open armature windings may be the cause. The motor will need to be removed from the
vehicle and repaired by a qualified technician.
See Motor Removal on page 17-4.
3. If reading is correct, reconnect the motor wires. See Motor Installation on page 17-15.
4. Connect the batteries. See Connecting the Batteries – Electric Vehicles, Section 1, Page 1-4.
TEST PROCEDURE 3 – Field Circuit Open
See General Warnings on page 1-2.
1. Disconnect the batteries and discharge the controller. See Disconnecting the Batteries – Electric Vehicles,
Section 1, Page 1-4.
2. Disconnect wires from the F1 and F2 terminals on the motor using two wrenches to prevent posts from turning.
Set a multimeter to 200 ohms and place the red (+) probe on the F1 terminal and the black (–) probe on the
F2 terminal. The multimeter should indicate continuity. If the reading is incorrect, a possible open field coil or
Page 17-2 2014 Precedent ® Golf Car Maintenance and Service Manual