Engine-Codes - Generic - B1305

B1305 - Accessory Delay Relay Coil Circuit Short To Ground

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B1305 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)

How do I fix code B1305?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the B1305 code

Labor: 1.0

The cost of diagnosing the B1305 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

B1305 Meaning

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).

B1305 More Information

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Information for specific makes

  • B1305 FORD Accessory Delay Relay Coil Circuit Short To Ground
  • B1305 LINCOLN Accessory Delay Relay Coil Circuit Short To Ground
  • B1305 MERCURY Accessory Delay Relay Coil Circuit Short To Ground

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