For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the HVAC Blower Controls System Check? | -- | Go to Step 2 | Go to HVAC Blower Controls System Check
2 |

1. Turn the ignition switch to the ON position.
2. Turn the blower switch to LOW.
3. Use the J 39200 Digital Multimeter (DMM) in order to backprobe the heater A/C control assembly connector C1.
4. Measure the voltage between terminal H and ground.

Does the voltage measured equal the specified value?

B+

Go to Step 3

Go to Step 4

3 |

1. Disconnect the blower resistor assembly.
2. Use the J 39200 DMM in order to measure the voltage between terminal B of the blower resistor assembly connector and ground.

Does the voltage measured equal the specified value?

B+

Go to Step 5

Go to Step 6

4 | Replace the heater A/C control assembly. Refer to Control Assembly Replacement . Is the repair complete? | -- | Go to HVAC Blower Controls System Check | --
5 | Replace the blower resistor assembly. Refer to Blower Motor Resistor Replacement . Is the repair complete? | -- | Go to HVAC Blower Controls System Check | --
6 | Repair the open in CKT 60 between the heater A/C assembly and the blower resistor assembly. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to HVAC Blower Controls System Check | --