Honda Civic Service Manual page 1406

Troubleshooting -'99 - 00 Models
Blower Motor Speed (cont'dl
HEATER CONTROL PANEL 2OP CONNECTOR
Wire side oJ female terminals
Wire side ot female terminals
Frcm page 21.29
LT GRN/BLK
Check tor a short in the wi.a:
Check for continuity between the
No. 1 terminal of the heater con
trol panel 20P connector and body
ground.
Repair short in ths wire betwsen
the hoater control panel and the
oower transastoa.
Check for an open in the wire:
1. Disconnect the heater control
panel 8P connector,
2. Turn the ignjtion switch ON 1ll).
3. Measure the voltage between
t h e N o . ' l t e r m i n a l o f t h e
heater control panel 8P con
nector and body ground.
Repeir open in the wiio between
the heater control panel and the
blower motoa.
Check the power transistor:
1. Turn the ignition switch OFF.
2. Reconnect the heater control
panel 8P and 20P connectors.
3. Test the power transistor {see
page 21 50).
ls the power transistor OK?
Check for loos€ wiras or poor con-
nections at the h€at€r control
panel 8P and 20P connectols and
at th6 power transistor 3P conn€c-
tor. lf the connections are good,
substituto a known-good hoater
control panel, and recheck. It the
symptom/indication goes away,
replace the original heater control
oanel,
HEATER CONTNOL PANEL 8P CONNECTOR
21-30