GMC chervolet camaro 1999 Service Manual page 111

1-20 HVAC System - Manual HVAC
Blower Motor Inoperative at
Any
Speed
Step
Action
Value(s) Yes No
Was the entire HVAC · Blower Controls System Check Goto HVAC
1 performed?
-
Blower Controls
Goto Step2
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 HV AC control
-
selector switch between connector C1 terminal E and
ground.
Is the test light on? Goto Step 3 Go to Step 12
1. Place the blower switch in the LO position.
3
2. With a test light, packprobe the HVAC control
selector switch between connector C1 terminal A and
-
ground.
Is the test light on?
Goto 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.
Place the ignition switch in the RUN position:
-
'
4.
5. Place the selector switch in the VENT position.
6. Place the blowet 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 B
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 1.1 Go to Step 10
Replace the blower motor. Refer to Blower Motor and Fan
9
Replacement
-
-
Is the repair complete?
Go to Step 17
10
Repair the poor connection or open in CKT 65.
-
-
Is the repair complete?
Go to Step 17
11
Repair the poor connection or open in CKT 850.
- -
Is the repair complete? Go to Step 17
Backprobe the HVAC control selector switch between
12
connector C2 terminal C and ground.
-
Is the test light on? Go to Step 13 Go to Step 15