AutoCodes – Cadillac – B388E Cadillac

B388E Cadillac Code - Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled

Quick Answer

The Trailer Interface Control Module is supplied with battery voltage as well as ignition voltage from the rear body fuse block and is permanently grounded. Common causes include Faulty Trailer Interface Control Module, Trailer Interface Control Module harness is open or shorted, Trailer Interface Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B388E Cadillac indicates Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled.
Common causes: Common causes include Faulty Trailer Interface Control Module, Trailer Interface Control Module harness is open or shorted, Trailer Interface Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 438

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B388E Cadillac Description

The Trailer Interface Control Module is supplied with battery voltage as well as ignition voltage from the rear body fuse block and is permanently grounded. For lighting operation, the trailer interface control module receives serial data messages from the Body Control Module (BCM) indicating what lamps have been activated on the vehicle. The trailer interface control module responds by applying voltage to the appropriate control circuits for the requested lamps illuminating the lamps on the attached trailer.
For stop lamp operation, the Trailer Interface Control Module receives an input from the center high mount stop lamp control circuit. When the brakes are applied on the vehicle, the Trailer Interface Control Module receives the brake applied input from the center high mount stop lamp control circuit. The trailer interface control module responds by applying voltage to the trailer stop lamp control circuit illuminating the trailer stop lamps. The trailer interface control module also receives a serial data message from the BCM indicating that the vehicle brakes have been applied.

OBDII Code B388E Cadillac - Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled - AutoCodes.com — B388E Cadillac Code - Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled

What does this mean?

What are the Possible Causes of the DTC B388E Cadillac?

Faulty Trailer Interface Control Module
Trailer Interface Control Module harness is open or shorted
Trailer Interface Control Module circuit poor electrical connection

How to Fix the DTC B388E Cadillac?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B388E Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B388E Cadillac Code

1. What are the common symptoms of OBDII code B388E in a Cadillac related to Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled?

- Common symptoms include malfunctioning trailer lamps, intermittent lighting issues, and dashboard warning lights related to the trailer lighting system.

2. What could cause the OBDII code B388E with the description "Trailer Lamps Number Of Intermittent Short Circuit Detections Exceeded Signal Cross Coupled" to trigger in a Cadillac?

- Possible causes include damaged wiring harnesses, faulty trailer lamp assemblies, water intrusion in electrical connections, or a malfunctioning control module.

3. How can I diagnose the OBDII code B388E in my Cadillac if I suspect an issue with the trailer lighting system?

- A thorough visual inspection of the trailer wiring, connectors, and lamp assemblies is recommended. Using a multimeter to check for continuity and inspecting for signs of water damage can help pinpoint the issue.

4. Are there any specific repair tips for addressing the OBDII code B388E related to Trailer Lamps Number Of Intermittent Short Circuit Detections in a Cadillac?

- Repair tips may include repairing or replacing damaged wiring, ensuring proper grounding for the trailer lighting system, and checking for any corrosion in electrical connections.

5. Can I continue to drive my Cadillac with the OBDII code B388E triggered, indicating an issue with the trailer lamps?

- It is not recommended to drive the vehicle with unresolved trailer lamp issues, as this may pose a safety hazard to both the driver and other motorists on the road.

6. Is resetting the OBDII code B388E in my Cadillac a temporary solution to the trailer lamp issue?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem causing the code to trigger. It is essential to diagnose and address the root cause of the issue.

7. How can I prevent the OBDII code B388E related to Trailer Lamps Number Of Intermittent Short Circuit Detections in my Cadillac from recurring?

- Regularly inspecting and maintaining the trailer lighting system, ensuring proper installation of trailer wiring harnesses, and protecting electrical connections from water damage can help prevent the issue from reoccurring.

8. Can a DIY enthusiast without advanced automotive knowledge fix the OBDII code B388E associated with trailer lamps in a Cadillac?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, complex electrical issues may require professional diagnosis and repair to ensure the problem is resolved correctly.

9. Are there any recalls or technical service bulletins related to the OBDII code B388E in Cadillac vehicles?

- It is recommended to check with the Cadillac dealership or manufacturer for any recalls or technical service bulletins related to the specific OBDII code B388E and its associated trailer lamp issue.

10. How much can I expect to pay for repairing the OBDII code B388E indicating a trailer lamp issue in my Cadillac?

- The cost of repairing the OBDII code B388E can vary depending on the specific cause of the issue. It is advisable to obtain estimates from reputable automotive repair shops or dealerships for an accurate cost assessment.