ELECTRICAL SYSTEM AND TESTING
Test Procedures
2005 Precedent IQ System Electric Golf Car Maintenance and Service Manual
Page 11-37
11
TEST PROCEDURE 16 – REVERSE BUZZER
See General Warnings, Section 1, Page 1-1.
1. Disconnect the battery cables as instructed.
See WARNING “To avoid unintentionally starting...” in
General Warnings, Section 1, Page 1-2.
2. Remove the instrument panel.
See step 2 of Key Switch Removal, Section 12, Page 12-1.
3. Disconnect the orange/white and pink wires from the reverse buzzer.
4. Place the Tow/Run switch in the TOW position and connect the battery cables, positive (+) cable first.
Tighten battery terminals to 110 in-lb (12.4 N·m).
5. Place the key switch in the OFF position and the Tow/Run switch in the RUN position.
6. Using a multimeter set to 200 volts DC, place the black (–) probe on battery no. 4 negative post and place
the red (+) probe on the pink wire terminal end that was disconnected from the reverse buzzer. The read-
ing should be approximately 48 volts (full battery voltage).
6.1. If the voltage reading is correct, proceed to step 7.
6.2. If reading is zero volts, check pink wire continuity and Tow/Run switch.
See Test Procedure 2 –
Onboard Computer Solenoid Lockout Circuit on page 11-15.
See also Test Procedure 6 –
Tow/Run Switch on page 11-19.
6.3. If the continuity readings are not correct, repair or replace the pink wire.
6.4. If the continuity readings are correct, proceed to step 7.
7. Place the Forward/Reverse switch in REVERSE. Using a multimeter set to 200 volts DC, place the black
(–) probe on the orange/white wire terminal end (that was disconnected from the reverse buzzer) and
place the red (+) probe on battery no. 1 positive post. The reading should be approximately 48 volts (full
battery voltage).
7.1. If the voltage reading is correct, replace the reverse buzzer.
7.2. If reading is zero volts, check orange/white wire continuity and connection at Pin 7 in 16-Pin con-
nector.
7.3. If there is no continuity in the orange/white wire, or the Pin 7 terminal in the 16-Pin connector is not
properly seated, repair or replace as required.
7.4. If the orange/white wire continuity and 16-Pin connector are correct and there is no voltage at the
orange wire, replace the controller.
TEST PROCEDURE 17 – REBOOTING THE ONBOARD COMPUTER
See General Warnings, Section 1, Page 1-1.
It is possible the onboard computer (OBC) can become “locked up”, causing the OBC solenoid lockout circuit
to malfunction. If this condition is suspected, restart the computer as follows:
1. Disconnect the battery cables as instructed.
See WARNING “To avoid unintentionally starting...” in
General Warnings, Section 1, Page 1-1. See following NOTE.
NOTE: Wait at least 90 seconds for the capacitors in the speed controller to discharge. The capacitors in
the speed controller must be fully discharged in order to reboot the OBC.
2. Place the Tow/Run switch in the TOW position and connect the battery cables, positive (+) cable first.
Tighten battery terminals to 110 in-lb (12.4 N·m) and coat terminals with Battery Terminal Protector
Spray (CCI P/N 1014305) to minimize corrosion.
3. Place Tow/Run switch in the RUN position.
4. Test drive the vehicle. If the vehicle functions normally the problem is corrected. If the problem still exists,
refer to Wiring Diagrams on page 11-2.
