INSPECTION PROCEDURE 4: Blower Fan and Motor does not Turn.: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Check the blower relay continuity.

Follow the table below to check the blower relay for continuity.

RELAY CHECK

BATTERY VOLTAGE	TESTER CONNECTION	SPECIFIED CONDITION
Not applied	4 - 5	Open circuit
Connect terminal 1 to the positive battery terminal Connect terminal 3 to the negative battery terminal	4 - 5	Less than 2 ohms

Q: Is the blower relay continuity in good condition?

YES : Go to Step 2.

NO: Replace the blower relay. Then go to Step 5.

Fig 1: Checking Blower Relay

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STEP 2. Check the blower fan and motor operation.
When battery voltage is applied between the terminals, check that the blower fan and motor operates.

Q: Is there any abnormal noise?

YES : Go to Step 3.

NO: Replace. Then go to Step 5.

Fig 2: Checking Blower Fan And Motor
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STEP 3. Check the blower switch continuity.

Follow the table below to check the blower switch for continuity.

BLOWER SWITCH CHECK

SWITCH POSITION	TESTER CONNECTION (CONNECTOR A)	SPECIFIED CONDITION
0 (OFF)	1 - 3, 3 - 4, 3 - 5, 3 - 6	Open circuit
1 (LO)	3 - 5	Less than 2 ohms
2 (ML)	1 - 3	Less than 2 ohms
3 (MH)	3 - 6	Less than 2 ohms
4 (HI)	3 - 4	Less than 2 ohms

Fig 3: Checking Blower Switch

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Q: Is the blower switch continuity in good condition?

YES : Go to Step 4.

NO: Replace. Then go to Step 5.

STEP 4. Check the resistor resistance value.

Use an ohmmeter to measure the resistance between the terminals as indicated below. Check that the measured value is at the standard value.

Standard value:

RESISTOR CHECK

MEASUREMENT TERMINAL	STANDARD VALUE Ω
Between terminals 3 and 2 (LO)	2.3
Between terminals 3 and 4 (ML)	1.1
Between terminals 3 and 1 (MH)	0.4

Fig 4: Checking Resistor Resistance Value

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Q: Is the measured value at the standard value?

YES : Go to Step 5.

NO: Replace. Then go to Step 5.

STEP 5. Retest the system.
Q: Is the blower fan and motor turned?

YES : The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS .)

NO: Go to Step 1.