B1549
Low Severity (Level 1)Power Window Master Circuit Short To Battery
B1549 usually means power Window Master Circuit Short To Battery.
Can you still drive with B1549?
✅Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
Typical repair cost: $120 – $600
Severity Level 1 — Low
This code indicates a minor issue that is unlikely to cause immediate driveability problems. You can typically continue driving but should have the vehicle inspected at your earliest convenience.
Common Symptoms
- Power window won't go up or down — stuck in current position
- Battery draining overnight or when vehicle is parked
- Power windows not responding to controls — stuck in one state
- Excessive current draw on the power window system circuit (fuse may blow repeatedly)
Possible Causes
- Damaged wiring in the power window system harness shorted to a 12V power source — wiring insulation chafed through from rubbing against metal body panels
- Water intrusion or corrosion in power window system electrical connector causing internal short to battery voltage
- Failed window motor/regulator — internal short to power within the component
- Aftermarket accessory installation tapped into the wrong circuit, back-feeding 12V
- Window regulator mechanical failure — cable snapped or pulley broken, motor runs but glass doesn't move
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($41-144 at shop, free at auto parts store for basic scan)
- Visually inspect the power window system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $131 diagnostic fee at shop)
- Repair or replace damaged section of wiring harness where short is located — solder and heat-shrink all connections, don't use crimp connectors on critical circuits ($126-298 depending on accessibility)
- If window motor/regulator is internally shorted, replace with a quality OEM or OEM-equivalent aftermarket unit ($100-500)
- Clean all ground points related to the power window system — remove bolt, sand contact surface to bare metal, apply dielectric grease, and torque to spec ($46-119 at shop)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B1549 mean?
B1549 stands for "Power Window Master Circuit Short To Battery". B1549 usually means power Window Master Circuit Short To Battery.
Can you drive with B1549?
Safe to drive — this is an informational or minor issue. Schedule diagnosis at your convenience.
How much does it cost to fix B1549?
Repair costs for B1549 typically range from $120 to $600, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($41-144 at shop, free at auto parts store for basic scan); Visually inspect the power window system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $131 diagnostic fee at shop); Repair or replace damaged section of wiring harness where short is located — solder and heat-shrink all connections, don't use crimp connectors on critical circuits ($126-298 depending on accessibility).
Will B1549 clear itself?
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