Auxiliary Blower Motor Inoperative. Cadillac Eldorado 2002

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2002 🢒 Eldorado 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Auxiliary Blower Motor Inoperative

Step	Action	Yes	No
Schematic Reference: HVAC Schematics DEFINITION: The auxiliary blower motor is inoperative in all speed positions.
1	Did you perform the HVAC Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - HVAC Systems - Automatic
2	Place the auxiliary blower motor switch in each speed positions. Is the auxiliary blower motor inoperative in each speed positions?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Turn OFF the ignition. Disconnect the auxiliary blower motor. Turn ON the ignition, with the engine OFF. Connect a test lamp between the supply voltage circuit of the auxiliary blower motor and the high speed blower motor control circuit. Place the blower motor switch in the maximum speed position. Does the test lamp illuminate?	Go to Step 9	Go to Step 4
4	Probe the supply voltage circuit of the auxiliary blower motor with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 6	Go to Step 5
5	Repair the ignition 3 voltage circuit of the auxiliary blower motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 12	--
6	Test the auxiliary high speed blower motor control circuit for an open or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 7
7	Test the ground circuit of the auxiliary blower motor switch for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 8
8	Inspect for poor connections at the auxiliary blower motor switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 10
9	Inspect for poor connections at the auxiliary blower motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 12	Go to Step 11
10	Replace the auxiliary blower motor switch. Refer to Auxiliary Blower Motor Switch Replacement . Did you complete the replacement?	Go to Step 12	--
11	Replace the auxiliary blower motor. Refer to Auxiliary Blower Motor Replacement in Heating, Ventilation and Air Conditioning. Did you complete the replacement?	Go to Step 12	--
12	Operate the system in order to verify the repair. Did you correct the condition?	Go to Step 2	System OK