B1472 - Lamp Headlamp Input Circuit Short To Ground

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Headlamp Switch
  • Headlamp Switch harness is open or shorted
  • Headlamp Switch circuit poor electrical connection
  • Faulty Smart Junction Box (SJB)

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1472 Description

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. When the headlamp switch is placed in the HEADLAMPS ON position, the voltage signal is routed to ground through the circuit. If the SJB detects a fault with the headlamp switch inputs, the SJB turns the exterior lamps on by default. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB sends voltage through circuits to the low beam headlamps. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the HIGH BEAM position, the SJB sends voltage through circuits to the high beam headlamps. The SJB sends a reference signal to the multifunction switch through circuits CLF27 (GN/BN) and CLF17 (WH/OG). When the multifunction switch is placed in the FLASH-TO-PASS or HIGH BEAM position, the voltage signal is routed to ground. When the SJB detects a request for the flash-to-pass, the SJB sends voltage to the high beam headlamps. The OBDII codes when the SJB detects a short to ground from the headlamps on request circuit or no input from the headlamp switch.
OBDII Code B1472 - Lamp Headlamp Input Circuit Short To Ground - AutoCodes.com

B1472 Information for specific makes

  • B1472 CHRYSLER Channel 4 Audio Speaker Output Circuit Open
  • B1472 DODGE Channel 4 Audio Speaker Output Circuit Open
  • B1472 FORD Lamp Headlamp Input Circuit Short To Ground
  • B1472 JEEP Channel 4 Audio Speaker Output Circuit Open
  • B1472 LEXUS A/C Inverter High Voltage Output System Malfunction
  • B1472 LINCOLN Lamp Headlamp Input Circuit Short To Ground
  • B1472 MERCURY Lamp Headlamp Input Circuit Short To Ground
  • B1472 RAM Channel 4 Audio Speaker Output Circuit Open
  • B1472 TOYOTA A/C Inverter High Voltage Output System Malfunction

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B1472 Comments

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