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Old 07-26-2004, 05:48 PM
lee lee is offline
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Join Date: Mar 2002
Location: Indialantic, Florida
Posts: 2,940
there's lots to check. To make your life a little easier, I cut & pasted from the climate PDF on Reaper's site:

BLOWER MOTOR DOES NOT OPERATE AT ALL OR IN HIGH SPEED
1) With ignition off, measure voltage between terminal No. 2
(Red wire) of off relay connector and ground. Off relay is located on
blower motor unit. If battery voltage is present, go to next step. If
battery voltage is not present, check fuses No. 20 and 21. Replace
fuses as necessary. If fuses are okay, repair open Red wire.
2) With ignition on, measure voltage between terminal No. 1
(White wire) of off relay connector and ground. If battery voltage is
present, go to next step. If battery voltage is not present, check
fuse No. 15. If fuse is blown, repair short circuit and replace fuse.
If fuse is okay, repair open White wire.
3) Turn ignition switch and A/C control panel OFF switch to
the on position. Measure voltage between terminal No. 3 (Blue wire) of
off relay connector and ground. If battery voltage is present, go to
next step. If battery voltage is not present, check for open Blue wire
between terminal No. 3 of off relay connector and terminal No. 12 of
auto amplifier 16-pin connector. Repair wiring as necessary. If Blue
wire is okay, replace auto amplifier and retest.
4) Put AUTO switch in on position and fan switch in HI
position. Measure voltage between terminal No. 3 (Blue wire) of off
relay connector and ground. If voltage is about one volt, go to next
step. If voltage is not approximately one volt, replace auto amplifier
and retest.
5) Disconnect 2-pin blower motor connector. Turn ignition on.
Put AUTO switch in on position and fan switch in HI position. Measure
voltage between terminal No. 1 (Red/Black wire) of blower motor
connector and ground. If battery voltage is present, go to step 7).
6) If battery voltage is not present, check Red/Black wire
between terminal No. 1 of blower motor connector and terminal No. 4 of
off relay connector. Repair wiring as necessary. If Red/Black wire is
okay, replace off relay.
7) Remove glove box, and disconnect fan control amplifier
connector. Fan control amplifier is located on cooling unit. With
ignition switch and AUTO switch in the on position, put fan switch in
LO or medium position.
8) Measure voltage between terminal No. 2 (Black/Red wire) of
hi relay connector and ground. If battery voltage is not present,
check for open Black/Red wire. If Black/Red wire is okay, replace
blower motor.
9) If battery voltage is present, measure voltage between
terminal No. 1 (White wire) of hi relay connector and ground. If
battery voltage is not present, repair open White wire. If voltage is
present, disconnect hi relay connector.
10) Check continuity between terminal No. 4 (Black wire) of
hi relay connector and ground. If no continuity exists, repair open
Black wire. If continuity exists, reconnect hi relay connector and go
to next step.
11) Ensure ignition is on. Put AUTO switch in on position.
Put fan switch in HI position. Measure voltage between terminal No. 3
(White/Red wire) of hi relay connector and ground. If one volt is
present, go to next step. If one volt is not present, check for open
White/Red wire. If White/Red wire is okay, replace auto amplifier.
12) Put fan switch in medium or LOW speed position. Measure
voltage between terminal No. 3 (White/Red wire) of hi relay connector
and ground. If battery voltage is present, replace hi relay. If
battery voltage is not present, replace auto amplifier.
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