Honda 2004 Odyssey Service Manual page 1662

Rear Blower Motor High Speed Circuit Troubleshooting - Hot and/or Cold
1. Remove the rear blower unit (see page 21-142).
2. Remove the rear blower motor main relay, and test
it (see page 22-88).
Is the relay OK ?
YES Go to step 3.
NO Replace the rear blower motor main relay.
3. Disconnect the rear blower resistor.
4. Measure the resistance between the No. 1 and
No. 2 terminals of the rear blower resistor.
REAR BLOWER RESISTOR
Is there about 0.6 ?
YES Go to step 5.
NO Replace the rear blower resistor.
5. Measure the voltage between the No. 1 terminal of
the rear blower motor main relay 6P connector and
body ground.
REAR BLOWER MOTOR MAIN RELAY
6P CONNECTOR
BLU/YEL
Wire side of female terminals
Is there battery voltage?
YES Go to step 6.
NO Repair open in the wire between the rear
blower motor and the rear blower motor main
relay.
6. Turn the ignition switch ON (II).
7. Measure the voltage between the No. 6 terminal of
the rear blower motor main relay 6P connector and
body ground.
REAR BLOWER MOTOR MAIN RELAY
6P CONNECTOR
Wire side of female terminals
Is there battery voltage?
YES Go to step 8.
NO Repair open in the wire between the No. 3
fuse in the driver's under-dash fuse/relay box and
the rear blower motor main relay.
8. Turn the ignition switch OFF.
BLK/YEL
(cont'd)
21-131