CHECK POWER SUPPLY CIRCUIT.

1) Disconnect the harness connector from key warning switch.

2) Measure the voltage between key warning switch harness connector terminal and chassis ground.

Connector & terminal

(B74) No. 1 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Check the harness for an open or short between the key warning switch and fuse.