B1304 - Accessory Delay Relay Coil Circuit Short To Battery

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

  • Faulty Accessory Delay Relay
  • Accessory Delay Relay harness is open or shorted
  • Accessory Delay Relay circuit poor electrical connection
  • Faulty Smart Junction Box (SJB)

Possible symptoms

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

B1304 Description

The accessory delay relay receives voltage at all times from the Smart Junction Box (SJB). The SJB controls the coil side ground of the accessory delay relay and activates the accessory delay relay when the ignition switch is in the ON position. The accessory delay relay remains active for an additional 10 minutes when the ignition switch is in the OFF position or until the driver door is opened. The accessory delay relay provides voltage to the door lock switches, power windows and roof opening panel (if equipped).
OBDII Code B1304 - Accessory Delay Relay Coil Circuit Short To Battery - AutoCodes.com

B1304 Information for specific makes

  • B1304 FORD Accessory Delay Relay Coil Circuit Short To Battery
  • B1304 LINCOLN Accessory Delay Relay Coil Circuit Short To Battery
  • B1304 MERCURY Accessory Delay Relay Coil Circuit Short To Battery

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B1304 Comments

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