Combination Switch (Light): Inspection

WARNING: This page is about a different car, the 2015 Subaru Outback and 2015 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

Measure the resistance between connector terminals.

Preparation tool:

Circuit tester

Fig 1: Identifying Combination Switch Connector Terminals

Courtesy of SUBARU OF AMERICA, INC.

Lighting switch

Terminal No.	Inspection conditions	Standard
18 - 12 19 - 12 20 - 12	Switch OFF	1 MΩ or more
19 - 12	Switch AUTO	Less than 1 Ω
18 - 12	Switch 1 (TAIL)	Less than 1 Ω
18 - 12 20 - 12	Switch 2 (HEAD)	Less than 1 Ω

Dimmer & passing switch

Terminal No.	Inspection conditions	Standard
11 - 12 17 - 12	Switch PASS	Less than 1 Ω
11 - 12	Switch UP	Less than 1 Ω

Turn signal switch

Terminal No.	Inspection conditions	Standard
13 - 12	Switch TURN (RH)	Less than 1 Ω
15 - 12	Switch TURN (LH)	Less than 1 Ω

Front fog light switch

Terminal No.	Inspection conditions	Standard
4 - 3	Switch OFF	1 MΩ or more
4 - 3	Switch ON	Less than 1 Ω

Replace the switch assembly - combination turn dimmer if the inspection result is not within the standard value.