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Home >> Toyota >> 2015 >> 4Runner TRD Pro >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (Exterior) - (Diagnostic Codes & Circuit Tests) >> Lighting System >> Circuit Tests >> Headlight Relay Circuit [08/2014 - ] >> Description

Headlight Relay Circuit [08/2014 - ]: Description

The main body ECU receives headlight dimmer switch information signals, and illuminates the low beam headlight.

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