CHECK HARNESS.

Use a tester to measure the voltage between the relay holder and chassis ground.

Connector & terminal

(F9) No. 7 (+) — Chassis ground (−):

(F9) No. 5 (+) — Chassis ground (−):

(B473) No. 1 (+) — Chassis ground (−):

(B473) No. 2 (+) — Chassis ground (−):

(B473) No. 6 (+) — Chassis ground (−):

(B473) No. 7 (+) — Chassis ground (−):

(B473) No. 11 (+) — Chassis ground (−):

(B473) No. 12 (+) — Chassis ground (−):

QUESTION

Is the voltage battery voltage?

Yes No

Check the DC power supply circuit.