Diesel Data: Automotive Repair

Service Hints

Headlight (With Daytime Running Light)

HEAD RELAY
1 - 2 : Closed with the light control SW at HEAD position or dimmer SW at FLASH position Closed with the engine running and the parking brake pedal depressed (Parking brake SW on)

B4 (A), B5 (B) BODY ECU
(A) 24 - GROUND : Always approx. 12 volts
(B) 6 - GROUND : Approx. 12 volts with engine running
(A) 15 - GROUND : Continuity with parking brake pedal depressed
(A) 13 - GROUND : Continuity with the dimmer SW at HIGH or FLASH position
(A) 14 - GROUND : Continuity with the light control SW at TAIL or HEAD position
(A) 11 - GROUND : Always continuity


Headlight (Without Daytime Running Light)


HEAD RELAY
2 - 1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position

C13 LIGHT CONTROL SW [COMB. SW]
13 - 16 : Closed with the light control SW at HEAD position

C13 DIMMER SW [COMB. SW]
8 - 16 : Closed with the dimmer SW at FLASH position
7 - 16 : Closed with the dimmer SW at HIGH or FLASH position