External Motor Testing - Club Car 2009-20011 Electric Precedent Maintenance And Service Manual

20

External Motor Testing

EXTERNAL MOTOR TESTING
The following tests can be performed without disassembling the motor using a multimeter or continuity tester.
NOTE: Tag the motor wires for identification before disconnecting.
Scrape a small amount of paint from motor housing (ground) and use this location when testing motor
terminals to electrical ground.
Index of Test Procedures
1 – Internal Short Circuits
2 – Armature Circuit Open
3 – Field Circuit Open
MOTOR TERMINALS
A1 to A2
F1 to F2
A1 to F1
A1 to F2
A2 to F1
A2 to F2
A1 to Ground
A2 to Ground
F1 to Ground
F2 to Ground
TEST PROCEDURE 1 – Internal Short Circuits
See General Warnings on page 1-1.
1. Disconnect the batteries and discharge the controller. See Disconnecting the Batteries – Electric Vehicles
on page 1-3.
2. Disconnect wires from terminals on motor using two wrenches to prevent posts from turning.
3. 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, S1, and S2 terminals respectively. Multimeter should indicate no
continuity between the motor housing and all individual terminals. If readings are incorrect, motor will need to be
removed from the vehicle and repaired by a qualified technician. See Motor Removal on page 20-3.
3.1. 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 S1 or S2 terminal indicates a possible grounded S1 or S2 terminal or field coil.
4. If readings are correct, reconnect the motor wires. See Motor Installation on page 20-14.
5. Place the Tow/Run switch in the TOW position and connect the batteries. See Connecting the Batteries –
Electric Vehicles on page 1-3.
TEST PROCEDURE 2 – Armature Circuit Open
See General Warnings on page 1-1.
1. Disconnect the batteries and discharge the controller. See Disconnecting the Batteries – Electric Vehicles
on page 1-3.
Page 20-2 2009-2011 Electric Precedent Maintenance and Service Manual
CONTINUITY TEST
RESULT
Continuity
No Continuity
No Continuity
No Continuity
No Continuity
MOTOR (MODEL EJ4-4001 AND EJ8-4001A)