Honda 2004 Odyssey Service Manual page 1555

Heating/Air Conditioning
Blower Motor Circuit Troubleshooting (cont'd)
19. Turn the ignition switch ON (II).
Does the blower motor run?
YES Go to step 20.
NO Go to step 27.
20. Turn the ignition switch OFF.
21. Disconnect the jumper wire.
22. Disconnect the heater fan switch 7P connector.
23. Turn the ignition switch ON (II).
24. Measure the voltage between the No. 3 terminal of
the heater fan switch 7P connector and body
ground.
HEATER FAN SWITCH 7P CONNECTOR
Wire side of female terminals
Is there battery voltage?
YES Go to step 25.
NO Repair open in the wire between the blower
motor and the heater fan switch.
25. Turn the ignition switch OFF.
21-24
BLU/RED
26. Check for continuity between the No. 1 terminal of
the heater fan switch 7P connector and body
ground.
HEATER FAN SWITCH 7P CONNECTOR
BLK
Wire side of female terminals
Is there continuity?
YES Replace the heater fan switch.
NO Check for an open in the wire between the
heater fan switch and body ground. If the wire is
OK, check for poor ground at G401.
27. Disconnect the jumper wire.
28. Disconnect the blower motor 2P connector.
29. Measure the voltage between the No. 1 terminal of
the blower motor 2P connector and body ground.
BLOWER MOTOR 2P CONNECTOR
YEL/BLK
Wire side of female terminals
Is there battery voltage?
YES Replace the blower motor.
NO Go to step 30.