GMC Chevrolet Camaro 1998 Service Manual page 127

HVAC HVAC System - Manual 1.,17
HVAC Blower Controls System Check (cont'd)
Step
Action Normal Results Abnornal Results
)
Place the blower switch in the The blower motor increases in speed. Blower Motor Inoperative in One
3 M2 positidn. Speed Only (High Speed Operates
Normally)
Place the blower switch in the The blower motor increases in speed.
• Blower Motor Inoperative at
HI position.
Any Speed
4
• Blower Motor High Speed
Inoperative
• Blower Motor Operates at High
Speed Only
5
Put the selector switch in the The blower motor stops. Blower Motor Always On
OFF position.
Blower Motor Inoperative at Any Speed
Step
Action Value(s) Yes
No
Was the entire HVAC Blower Controls System Check Go to HVAC
1 performed?
-
Blower Controls
Go to Step 2 System Check
1. Place the ignition switch in the RUN position.
2. Place the selector switch in the VENT position.
2
3. With a test light, backprobe the HVAC control -
selector switch between connector C1 terminal E and
ground.
Is the test light on?
Go to Step 3 Go to Step 12
1. Place the blower.switch in the LO position.
3
2. With a test light, backprobe the HVAC control
selector switch between connector C1 terminal A and
-
ground.
Is the test light on? Go to Step 4
Go to Step 5
1. Place the ignition switch in the OFF position.
2. Disconnect the blower motor relay.
3. Connect a fused jumper between terminal 82 and
4
terminal C1.
-
4. Place the ignition switch in the RUN position.
5. Place the selector switch in the VENT position.
6. Place the blower switch in the LO position.
Does the blower motor run? Go to Step 7 Go to Step 6
Replace the HVAC control selector switch. Refer to
5
Control Assembly Replacement
-
-
Has the repair been made? Go to Step 17
1. Leave the jumper connected from previous step.
2. Disconnect the blower motor connector.
6
3. Connect a test light between the blower motor
-
connector terminal A and terminal B.
Is the test light on? Go to Step 9 Go to Step 8
Replace the blower motor relay. Refer to Blower Motor
7
Relay Replacement -
Is the repair complete? Go to Step 17
1. Leave the jumper connected from previous step.
)
8
2. Connect the test light between the blower motor
-
connector terminal B and ground.
Is test light on? Go to Step 11 Go to Step 10