← View Generic B3739 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2019 Ford F150 PICKUP
B3739: B3739: Power Window Relay Circuit Malfunction
on 2019 Ford F150 PICKUP
Fix Cost
$50 - $150
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2019 Ford
F150 PICKUP
⚠️
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 B3739 Mean on 2019 Ford F150 PICKUP?
The power window relay circuit has malfunctioned, preventing the windows from functioning properly.
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Symptoms
- • Windows do not move
- • or move intermittently
- • when switches are activated.
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Common Causes
- • Faulty power window relay
- • wiring issues
- • or faulty window switch.
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How to Fix B3739 on 2019 Ford F150 PICKUP
1. Disconnect battery to reset system. 2. Check and clean wiring connections. 3. Replace faulty power window relay. 4. Test window operation.
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Need Maintenance Info for Your F150 PICKUP?
Get oil capacity, filter specs, and torque settings for your specific 2019 Ford F150 PICKUP.
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Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B3739
B3737
Sequential Code
B3737: Climate Control Temperature Sensor Malfunction
Medium
B3738
Sequential Code
B3738: Door Locks Actuator Malfunction
Medium
B3740
Sequential Code
B3740: Seat Position Sensor Circuit Malfunction
Medium
B3741
Sequential Code
B3741: Exterior Lighting Malfunction
Medium
💡 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