Test N-14: Taillight Switch, Headlight Switch, Passing Light Switch, Dimmer Switch & Turn Signal Light Switch Circuit Checks

1. Turn ignition switch to each position. Check if Diagnostic Trouble Code (DTC) sets. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If DTC does not set, go to next step. If DTC sets, diagnose DTC.
2. Disconnect lighting switch 12-pin connector. With lighting switch in indicated positions, check continuity between specified lighting switch connector terminals. See LIGHTING SWITCH CONTINUITY TEST  table. See Fig 1 . If lighting switch continuity is not as specified, replace lighting switch and retest system. If lighting switch continuity is as specified, replace column switch or ETACS-ECU and retest system.
   NOTE: On retest, lighting switch input signal checks should be okay. Light reminder tone alarm, headlight, headlight automatic shutdown, headlight dimmer switch automatic resetting, turn signal lights and foglight should operate normally.
   LIGHTING SWITCH CONTINUITY TEST
   
   

   Switch Position		Continuity Between Terminals No.
   Off		(1)
   Taillight Switch On		5 & 9
   Headlight Switch On		5, 7 & 9
   Passing Light Switch On		2 & 12
   Dimmer Switch On		2, 11 & 12
   Turn Signal Switch
   Left		1 & 2
   Right		2 & 3
   (1) Continuity should not exist between any terminals.

Fig 1: Identifying Lighting Switch Terminals

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.