Honda 2004 Odyssey Service Manual page 1660

Rear Blower Motor Middle Speed Circuit Troubleshooting
1. Remove the rear blower unit (see page 21-142).
2. Remove the rear blower motor middle relay, and
test it (see page 22-88).
Is the relay OK ?
YES Go to step 3.
NO Replace the rear blower motor middle
relay.
3. Disconnect the rear blower resistor.
4. Measure the resistance between the No. 1 and
No. 4 terminals of the rear blower resistor.
REAR BLOWER RESISTOR
Is there about 1.4 ?
YES Go to step 5.
NO Replace the rear blower resistor.
5. Check for continuity between the No. 4 terminal of
the rear blower resistor 5P connector and the No. 2
terminal of the rear blower motor middle relay 5P
socket.
REAR BLOWER RESISTOR 5P CONNECTOR
Wire side of female terminals
GRN/WHT
REAR BLOWER MOTOR MIDDLE RELAY 5P SOCKET
Is there continuity?
YES Go to step 6.
NO Repair open in the wire between the rear
blower resistor and the rear blower motor middle
relay.
6. Check for continuity between the No. 1 terminal of
the rear blower motor middle relay 5P socket and
body ground.
REAR BLOWER MOTOR MIDDLE RELAY 5P SOCKET
BLK
Is there continuity?
YES Go to step 7.
NO Check for an open in the wire between the
rear blower motor middle relay and body ground. If
the wire is OK, check for poor ground at G582.
GRN/WHT
(cont'd)
21-129