← View Generic B1237 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2019 Ford F150 PICKUP

B1237: B1237: Low Beam Headlight Relay Circuit Malfunction

on 2019 Ford F150 PICKUP

Fix Cost

$50 - $150

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

✅ Yes

Save money

Your Vehicle

2019 Ford

F150 PICKUP

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Important for 2019 Ford F150 PICKUP Owners

Before starting repairs, verify which engine your 2019 Ford F150 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B1237 Mean on 2019 Ford F150 PICKUP?

The B1237 code indicates a problem with the low beam headlight relay circuit, which controls the low beam headlights. This can cause the headlights to malfunction or not turn on.

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Symptoms

• Headlights not turning on
• dim or flickering lights
• warning lights on dashboard

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Common Causes

• Faulty headlight relay
• wiring issues
• blown fuse
• headlight switch malfunction

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How to Fix B1237 on 2019 Ford F150 PICKUP

1. Check and replace the headlight relay if faulty. 2. Inspect and repair any wiring issues. 3. Check and replace the fuse if blown. 4. Test and replace the headlight switch if malfunctioning.

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Parts for 2019 Ford F150 PICKUP

Headlight relay Shop ↗ Wiring harness Shop ↗ Fuse Shop ↗ Headlight switch Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1237

B1235 Sequential Code

💡 Why These Codes Are Related:

• Similar Issues: Same root cause or component failure
• Related Problems: Often occur together due to system interactions
• Sequential Codes: Progressive failure stages or multiple sensors
• Same System: Components within the same automotive system