Has the HVAC Blower Controls System Check been performed?

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Go to Step 2

Go to Heater Blower Controls System Check

1. Remove the blower motor relay high.
2. Connect a DMM (volts) between cavity A2 of the relay and ground.

Is battery voltage present?

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Go to Step 3

Go to Step 6

1. Turn the Ignition Switch to the RUN position.
2. Place the HVAC Control Module blower switch in the High position.
3. Connect a DMM (volts) between cavity C2 of the relay and ground.

Is voltage present?

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Go to Step 4

Go to Step 8

Connect a DMM (continuity) between the blower motor relay high cavity A1 and ground.

Is there continuity?

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Go to Step 5

Go to Step 7

Replace the blower motor relay high. Refer to Blower Motor Relay Replacement .

Is the repair complete?

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Go to Heater Blower Controls System Check

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Locate and repair the open in CKT 542 (RED) between the underhood block and the blower motor relay high. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Heater Blower Controls System Check

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Locate and repair the open in CKT 150 (BLK) between the blower motor relay high and ground G202. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Heater Blower Controls System Check

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1. Disconnect connector C2 at the HVAC control module.
2. Connect a DMM (continuity) between the HVAC control module connector C2, pins H and G.
3. Turn the HVAC control module to the HIGH position.

Is there continuity?

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Go to Step 9

Go to Step 10

Locate and repair the open in CKT 52 (ORN) between the HVAC control module and the blower motor relay high. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Heater Blower Controls System Check

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Replace the HVAC control module. Refer to Blower Switch Replacement .

Is the repair complete?

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Go to Heater Blower Controls System Check

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