Engine-Codes - Gmc - B1448 GMC

B1448 GMC Code - Accessory Power Relay Circuit

- Code Popularity: 544 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code B1448 GMC?

  • Faulty Accessory Power Relay
  • Accessory Power Relay harness is open or shorted
  • Accessory Power Relay circuit poor electrical connection
  • Faulty Rear Wiper Motor
  • Faulty Body Control Module (BCM)

|How to Fix the B1448 GMC 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 Code B1448 GMC?

Labor: 1.0

The cost to diagnose the B1448 GMC 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.

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|What are Code B1448 GMC Possible Symptoms?

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

|What Does the B1448 GMC Code Mean?

The Body Control Module (BCM) supplies accessory voltage as required for the Rear Wiper Motor and controls the Rear wiper and washer relay through the accessory voltage circuit from BCM harness. The Diagnostic Trouble Code (DTC) will set only when the output is activated and there is a short to ground in the accessory voltage circuit.

Accessory Power Relay Circuit

|Need more Information on the B1448 GMC Code?

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|Need Help with the B1448 GMC Code?

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