11
Test Procedures
IQ SYSTEM TROUBLESHOOTING
11. While monitoring the multimeter, place the Forward/Reverse switch in the FORWARD position. The multimeter
should still indicate zero volts.
12. Place the Forward/Reverse switch in the REVERSE position. The multimeter should indicate full battery voltage
(approximately 48 volts).
13. If any other reading is obtained, check the following items:
– Continuity of the wires in the wire harness
– Forward/Reverse switch for proper operation.
See Test Procedure 23 – Forward/Reverse Rocker Switch on
page 11-32.
– Tow/Run switch for proper operation.
See Test Procedure 6 – Tow/Run Switch on page 11-17.
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
200 DCV Setting (reading with Tow/Run switch in RUN and Forward/Reverse switch in FORWARD)
689
Figure 11-13
Pins 8 and 16 Test
TEST PROCEDURE 15 – Pin 9
See General Warnings on page 1-1.
Pin 9 in the 16-pin connector provides a connection point for the Tow/Run switch to the speed controller. The switch
provides a +48 volt signal to the speed controller through pin 9 when the Tow/Run switch is in the RUN position.
1.
Disconnect the battery cables and discharge the controller as instructed.
See WARNINGS “To avoid
unintentionally starting...” and “After disconnecting the batteries, wait 90 seconds...” in General
Warnings on page 1-1.
2.
Place chocks at the front wheels and lift the rear of the vehicle with a chain hoist or floor jack. Position jack
stands under the frame rails just forward of each spring mount.
See WARNING “Lift only one end...” in
General Warnings on page 1-1.
3.
Disconnect the 16-pin connector at the speed controller.
4.
Using a multimeter set for 200 volts DC, insert the red (+) probe of the multimeter into pin 9 (gray wire) of the
16-pin connector.
See following CAUTION.
Using an alligator clip, connect the black (–) probe to the B– terminal
of the speed controller
(Figure 11-14, Page 11-27)
.
Page 11-26
2009 Electric Precedent Maintenance and Service Manual