CHECK REAR FOG LIGHT RELAY POWER SUPPLY.

1) Remove the rear fog light relay.

2) Measure the voltage between rear fog light relay connector and chassis ground.

Connector & terminal

RHD model

(B225) No. 10 (+) — Chassis ground (−):

LHD model

(B225) No. 31 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 — 13 V?

Yes No

Check the clearance light & illumination light system.