AutoCodes – Generic – B17B1

B17B1 Code - Rear Right Trailer Turn Lamp Control Circuit Short To Battery

Quick Answer

Four relays are used to provide voltage to the Trailer Tow connector. Common causes include Faulty Rear Right Trailer Turn Lamp, Rear Right Trailer Turn Lamp harness is open or shorted, Rear Right Trailer Turn Lamp 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: B17B1 indicates Rear Right Trailer Turn Lamp Control Circuit Short To Battery.
Common causes: Common causes include Faulty Rear Right Trailer Turn Lamp, Rear Right Trailer Turn Lamp harness is open or shorted, Rear Right Trailer Turn Lamp 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 1,162

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B17B1 Description

Four relays are used to provide voltage to the Trailer Tow connector. The trailer tow relays are used to switch fused battery voltage directly to the Trailer Tow connector when requested. The trailer tow relays are activated through a ground path provided by the Body Control Module (BCM). The BCM sets the OBDII code when it detects a short to voltage on the Right Rear Trailer Turn Lamp Control circuit.

OBDII Code B17B1 - Rear Right Trailer Turn Lamp Control Circuit Short To Battery - AutoCodes.com — B17B1 Code - Rear Right Trailer Turn Lamp Control Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B17B1?

Faulty Rear Right Trailer Turn Lamp
Rear Right Trailer Turn Lamp harness is open or shorted
Rear Right Trailer Turn Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B17B1?

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 B17B1 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.

Need more information about the B17B1 code?

Need more information on how to fix the B17B1 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

B17B1 Chrysler — Rear Right Trailer Turn Lamp Control Circuit Short To Battery
B17B1 Dodge — Rear Right Trailer Turn Lamp Control Circuit Short To Battery
B17B1 Jeep — Rear Right Trailer Turn Lamp Control Circuit Short To Battery
B17B1 RAM — Rear Right Trailer Turn Lamp Control Circuit Short To Battery

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 B17B1 Code

1. What are common symptoms of OBDII code B17B1?

Symptoms may include the rear right trailer turn lamp not functioning, the lamp staying on constantly, or a warning light on the dashboard.

2. What causes the OBDII code B17B1 to trigger?

This code is typically triggered by a short circuit between the rear right trailer turn lamp control circuit and the battery.

3. How can I diagnose the issue related to code B17B1?

You can start by checking the wiring harness for any visible damage or signs of a short circuit. Testing the circuit with a multimeter can help pinpoint the exact location of the short.

4. Can a blown fuse cause the B17B1 code?

Yes, a blown fuse in the rear right trailer turn lamp circuit can lead to a short circuit and trigger the B17B1 code.

5. Is it safe to drive with the B17B1 code active?

It is not recommended to drive with the B17B1 code active, as it indicates a potential electrical issue that could affect the proper functioning of the trailer turn lamp.

6. How can I repair the B17B1 code?

Repairing the B17B1 code involves locating and fixing the short circuit between the rear right trailer turn lamp control circuit and the battery. This may require repairing or replacing damaged wiring.

7. Can moisture or water ingress cause the B17B1 code?

Yes, moisture or water ingress in the wiring harness or lamp assembly can lead to a short circuit and trigger the B17B1 code.

8. Are there any special tools needed to diagnose the B17B1 code?

While basic tools like a multimeter and wiring diagram are useful for diagnosing the B17B1 code, specialized diagnostic tools may be required for advanced troubleshooting.

9. Will resetting the OBDII code clear the issue related to B17B1?

Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the B17B1 code to trigger. Proper diagnosis and repair are necessary.

10. Can a damaged trailer wiring harness cause the B17B1 code?

Yes, a damaged trailer wiring harness, especially near the rear right turn lamp, can cause a short circuit and trigger the B17B1 code.