Engine-Codes - Lincoln - B1578 LINCOLN

B1578 LINCOLN Code - Lamp Park Input Circuit Short To Ground

- Code Popularity: 325 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the B1578 LINCOLN Code?

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

|How to Fix the B1578 LINCOLN Code?

Start by checking 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.

|What is the cost to diagnose the B1578 LINCOLN code?

Labor: 1.0

The cost to diagnose the B1578 LINCOLN code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1578 LINCOLN code possible symptoms?

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

|What Does the B1578 LINCOLN Code Mean?

The Smart Junction Box (SJB) monitors the parking lamp request input from the headlamp switch. The SJB provides a ground for the parking lamp relay coil (integrated into the SJB ) when a request for the parking lamps is received. When the parking lamp relay is energized, voltage is routed to the rear and front parking lamps. The Diagnostic Trouble Code (DTC) sets when the SJB detects a short to ground from the parking lamps on input circuit.

Lamp Park Input Circuit Short To Ground

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