GMC chevrolet camaro 2000 Service Manual page 220

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HVAC HVAC Systems - Manual 1-123
Blower Motor High Speed Inoperative (cont'd)
Step
Action
Value(s)
Replace the blower motor relay. Refer to Blower Motor
11
Relay Replacement.
-
Did you complete the replacement?
Repair an open or a poor connection in the battery positive
12
voltage circuit of the blower motor relay. Refer to
-
Connector Repairs or Wiring Repairs in Wiring Systems.
Did you complete the repair?
13
Operate the system in order to verify the repair.
-
Did you correct the coridition?
Blower Motor Always On
Step
Action
Did you complete the Diagnostic System Check?
1
1. Turn the ignition switch to the OFF position.
2. Disconnect the blower motor relay.
2
3. Connect a test lamp at the blower motor relay
connector terminal A 1 and ground.
Does the test lamp illuminate?
Repair a short to battery voltage in the control circuit of the
3
high blower motor. Refer to Wiring Repairs in Wiring
Systems.
Did you complete the repair?
Connect a test lamp at the blower motor relay connector
4
terminal B2 and ground.
Does the test lamp illuminate?
Repair a short to battery voltage in the blower resistor
5
control circuit of the blower motor.
Did you complete the repair?
Connect a test lamp at the blower motor relay connector
6
terminal C1 and ground.
Does the test lamp illuminate?
Repair a short to battery voltage in the supply voltage
7
circuit of the blower motor. Refer to Wiring Repairs iri
Wiring Systems.
Did you complete the repair?
Replace the blower motor relay. Refer to Blower Motor
8
Relay Replacement.
Did you complete the replacement?
9
Operate the system in order to verify the repair.
Did you correct the condition?
Air Delivery Improper
The air delivery system uses an engine manifold
vacuum in order to position the heater A/C module
valves. The positioning of the valves allows the
air delivery system to achieve the desired air flow.
The engine manifold vacuum is controlled by the
heater A/C control.
Value(s)
-
-
-
-
-
-
-
-
-
Yes
Go to Step 13
Go to Step 13
System OK
Yes
Go to Step 2
Go to Step 3
Go to Step 9
Go to Step 5
Go to Step 9
Go to Step 7
Go to Step 9
Go to Step 9
System OK
No
-
-
Go to Step 3
No
Go to A
Diagnostic
System Check
Go to Step 4
-
Go to Step 6
-
Go to Step 8
-
-
Go to Step 3