Hazard Warning Lamp Does Not Operate But Turn Signal Lamps Operate

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK BULB
Make sure bulb standard of each turn signal lamp is correct. Refer to "EXTERIOR LAMP ".

OK or NG
- OK: GO TO 2.
- NG: Replace turn signal lamp bulb. Refer to "FRONT PARKING LAMP (INNER OR OUTER) " for front turn signal bulb. Refer to "BULB REPLACEMENT (TURN SIGNAL) " for rear turn signal bulb.
CHECK HAZARD SWITCH INPUT SIGNAL
With CONSULT-II

Select "BCM" on CONSULT-II. With "FLASHER" data monitor, make sure "HAZARD SW" turns ON-OFF linked with operation of hazard switch.
- When hazard switch is in ON position: HAZARD SW ON
  
  Fig 1: Identifying "HAZARD SW" Turned "ON"
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II

Check voltage between BCM harness connector M18 terminal 29 (W/B) and ground.

Fig 2: BCM Harness Connector M18 Terminal 29 (W/B) And Ground Voltage Specification Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Voltage Between BCM Harness Connector M18 Terminal 29 (W/B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".
- NG: GO TO 3.
CHECK HAZARD SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and hazard switch connector.
3. Check continuity between BCM harness connector M18 terminal 29 (W/B) and hazard switch harness connector M55 terminal 2 (W/B).
  - 29 (W/B) - 2 (W/B): Continuity should exist.
OK or NG
- OK: GO TO 4.
- NG: Repair harness or connector.
Fig 4: Checking Continuity Between BCM Harness Connector M18 Terminal 29 And Hazard Switch Harness Connector M55 Terminal 2
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND
Check continuity between hazard switch harness connector M55 terminal 1 (B) and ground.
- 1 (B) - Ground: Continuity should exist.
OK or NG
- OK: GO TO 5.
- NG: Repair harness or connector.
Fig 5: Checking Continuity Between Hazard Switch Harness Connector M55 Terminal 1 (B) And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HAZARD SWITCH
1. Disconnect hazard switch connector.
2. Check continuity of hazard switch.
  
  Fig 6: Hazard Switch Continuity Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 7: Checking Continuity Of Hazard Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace BCM if turn signal lamps does not work after setting the connector again. Refer to "REMOVAL AND INSTALLATION OF BCM ".
- NG: Replace hazard switch. Refer to "REMOVAL AND INSTALLATION ".