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On-Bench Testing

NOTE: For bench testing, a 12-volt power source is needed.
  1. Remove control panel. See CONTROL SWITCH/TIMER RELAY MODULE  under REMOVAL & INSTALLATION.
  2. Connect a jumper wire between ground and control switch/timer relay module connector terminal No. 3 (Black/Light Green wire). See Figure. Using an external DC power supply, apply 12 volts to control switch/timer relay module connector terminals No. 1 (Black/Red wire) and 2 (White wire). Go to next step.
  3. Turn defogger switch on. Using voltmeter, measure voltage at control switch/timer relay module connector terminal No. 5 (Black/White wire). Battery voltage should exist. Turn defogger off. Voltage should not exist. If voltage is as specified, go to next step. If voltage is not as specified, replace control panel. See CONTROL SWITCH/TIMER RELAY MODULE  under REMOVAL & INSTALLATION.
  4. Turn defogger on. Indicator light should illuminate and remain on 8-10 minutes. If indicator fails to operate as specified, replace control panel. See CONTROL SWITCH/TIMER RELAY MODULE  under REMOVAL & INSTALLATION.
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