Mazda CX-9 Grand Touring. Manual - part 482

2. Remove the front bumper. (See FRONT BUMPER REMOVAL/INSTALLATION .)  

3. Remove the front combination light. (See FRONT COMBINATION LIGHT 

REMOVAL/INSTALLATION.)  

4. Remove in the order indicated in the table. 

Fig. 11: Identifying Discharge Headlight Control Module, Connector & Screws 
Courtesy of MAZDA MOTORS CORP. 

5. Install in the reverse order of removal.  

DISCHARGE HEADLIGHT SYSTEM INSPECTION 

DISCHARGE HEADLIGHT INOPERATIVE 

WARNING:



Incorrect servicing of the discharge headlights could result in electric
shock. Before servicing the discharge headlights, always refer to the 
DISCHARGE HEADLIGHT SERVICE WARNINGS. (See DISCHARGE 
HEADLIGHT SERVICE WARNINGS.) 

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Lighting Systems - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:39:05 AM

Page 9 

© 2005 Mitchell Repair Information Company, LLC. 

Inspection procedure  

INSPECTION PROCEDURE 

Fig. 12: Identifying Relay & Main Fuse Block 
Courtesy of MAZDA MOTORS CORP. 

STEP

INSPECTION

ACTION

1

INSPECT POWER SUPPLY CIRCUIT OF 
DISCHARGE HEADLIGHT CONTROL 
MODULE  



Disconnect the discharge headlight control 
module connector.  



Turn the headlight switch to the 
HEADLIGHT (LO) position.  



Measure the voltage at discharge headlight 
control module terminal A (wiring harness-
side).  



Is the voltage approx. 12 V?  

Yes

Go to Step 6.

No

Go to the next step.

2

INSPECT FUSE  



Turn the headlight switch to the OFF 
position.  



Remove the H/L LOW R 15 A fuse or H/L 

Yes

Go to the next step.

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Lighting Systems - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:39:05 AM

Page 10 

© 2005 Mitchell Repair Information Company, LLC. 

LOW L 15 A fuse.  



Inspect the fuses.  



Are the fuses normal?  

No

Replace the fuse.

3

INSPECT H/L LOW RELAY  



Inspect the H/L LOW relay. (See RELAY 
INSPECTION .)  



Is the H/L LOW relay normal?  

Yes

Go to the next step.

No

Replace the H/L LOW relay. (See RELAY 

INSPECTION .)

4

INSPECT LIGHT SWITCH  



Inspect the light switch. (See LIGHT 
SWITCH INSPECTION.)  



Is the light switch normal?  

Yes

Go to the next step.

No

Replace the light switch. (See LIGHT 

SWITCH 

REMOVAL/INSTALLATION.)

5

INSPECT WIRING HARNESS BETWEEN 
BATTERY AND DISCHARGE HEADLIGHT 
CONTROL MODULE  



Disconnect the negative battery cable.  



Inspect for continuity between the 
following terminals: 



Battery (positive terminal) and H/L 
LOW relay terminal E.  



H/L LOW R 15 A fuse and discharge 
headlight control module terminal A  



H/L LOW L 15 A fuse and discharge 
headlight control module terminal A  



Are the wiring harnesses normal?  

Yes

Go to the next step.

No

Replace the related wiring harness.

6

INSPECT WIRING HARNESS BETWEEN 
DISCHARGE HEADLIGHT CONTROL 
MODULE AND GROUND  



Inspect the wiring harness between 
discharge headlight control module terminal 
B and ground for the following: 



Short to power supply  



Open circuit  



Is the wiring harness normal?  

Yes

Go to the next step.

No

Replace the related wiring harness.

VERIFY WHETHER MALFUNCTION IS IN 
DISCHARGE HEADLIGHT BULB OR 
DISCHARGE HEADLIGHT CONTROL 
MODULE  



Install the discharge headlight low bulb 

Yes

System inspection completed.

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Lighting Systems - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:39:06 AM

Page 11 

© 2005 Mitchell Repair Information Company, LLC. 

PARKING/FRONT SIDE MARKER LIGHT BULB REMOVAL/INSTALLATION 

1. Disconnect the negative battery cable.  

2. Remove the coolant reserve tank. (RH only) (See COOLANT RESERVE TANK 

REMOVAL/INSTALLATION [MZI-3.7] .)  

3. Remove in the order indicated in the table. 

Fig. 13: Identifying Parking/Front Side Marker Light Bulb, Connector & Socket 
Courtesy of MAZDA MOTORS CORP. 

4. Install in the reverse order of removal.  

FRONT TURN LIGHT BULB REMOVAL/INSTALLATION 

1. Disconnect the negative battery cable.  

2. Remove the coolant reserve tank. (RH only) (See COOLANT RESERVE TANK 

REMOVAL/INSTALLATION [MZI-3.7] .)  

3. Remove in the order indicated in the table. 

7

(previously verified as illuminating 
normally). (See HEADLIGHT BULB 
REMOVAL/INSTALLATION.)  



Connect the discharge headlight control 
module connector.  



Turn the headlight switch to the 
HEADLIGHT (LO) position.  



Does the headlight (low-beam) illuminate?  

No

Replace the discharge headlight control 

module. (See DISCHARGE 

HEADLIGHT CONTROL MODULE 

REMOVAL/INSTALLATION.)

 

2008 Mazda CX-9 Grand Touring 

2008 BODY & ACCESSORIES Lighting Systems - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 10:39:06 AM

Page 12 

© 2005 Mitchell Repair Information Company, LLC.