ELECTRICAL SYSTEM AND TESTING
Troubleshooting
Page 11-22
2008-2011 IQ Plus Electric Vehicle Maintenance and Service Supplement
11
6. With the IQDM still connected to the vehicle, place the Tow/Run Switch in the TOW position and wait 90
seconds.
7. If the IQDM display screen goes blank, the Tow/Run switch and connecting wires are operating correctly.
8. If the IQDM display screen is still active after 90 seconds, the switch has failed closed. Replace the Tow/
Run switch.
See Key Switch Removal, Section 13, Page 13-1.
Tow/Run Switch Test without the IQDM Handset
1. Set a multimeter to 200 volts DC. With the batteries connected, and the Tow/Run switch in either the
TOW or RUN position, connect the black (–) probe to the negative post of battery no. 8 and connect red
(+) probe (with insulation-piercing probe) on the pink wire close to the two-pin connector on the Tow/Run
switch
2. If the reading is 48-50 volts, proceed to Step 3. If the voltage reading is 0 volts, check the continuity of
the pink 18-gauge wire from the large post of the solenoid (2)
to the two-pin connector
(3)
at the Tow/Run switch.
3. Set a multimeter to 200 volts DC and with the batteries connected, connect the black (–) probe to the neg-
ative post of battery no. 8 and connect red (+) probe (with insulation-piercing probe) on the light green
wire (1) close to the two-pin connector on the Tow/Run switch
4. With the Tow/Run switch in the RUN position, the reading should be approximately 48-50 volts. With the
switch in the TOW position, the reading should be approximately 0 volts.
5. If the two-pin connector and pink wire continuity readings are correct, replace the Tow/Run switch.
Figure 11-15 Test Tow/Run Switch
Figure 11-16 Test Continuity: Pink Wire on Solenoid
Post
Figure 11-17 Test Continuity: Two-pin Connector
1
2
3
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