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B3888 Buick Code - Trailer Right Turn Signal Circuit

- Code Popularity: 300 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B3888 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Trailer Right Turn Signal
  • Trailer Right Turn Signal harness is open or shorted
  • Trailer Right Turn Signal circuit poor electrical connection
  • Faulty Trailer Lighting Control Module
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How to Fix the DTC B3888 Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

B3888 02 Trailer Right Turn Signal Circuit Short to Ground
B3888 04 Trailer Right Turn Signal Circuit Open

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3888 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code B3888 Buick Description

The Trailer Lighting Control Module receives a serial data message from the Body Control Module (BCM) indicating that the vehicle left or right turn signal lamp has been activated. The Trailer Lighting Control Module responds by applying a pulsating voltage to the appropriate trailer turn signal lamp through their respective control circuit illuminating the desired trailer turn signal lamp. The Diagnostic Trouble Code (DTC) sets when the Trailer Lighting Control Module detects a short to ground or an open/high resistance in the right trailer turn signal control circuit.

OBDII Code B3888 Buick - Trailer Right Turn Signal Circuit - AutoCodes.com
B3888 Buick Code - Trailer Right Turn Signal Circuit

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