B1425

Code

Other B — Body

Power Window RR Motor Circuit Short To Ground

Brand: Other

Type: B — Body

Views: UK: 42 EN: 45 RU: 44

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Page language: EN

Causes

Damaged power window motor wiring harness (chafing, pinched, or rubbed through)
Shorted motor armature or internal motor short to ground
Failed power window switch (short inside switch)
Defective connector or corroded terminal shorted to chassis
Module output transistor or driver shorted internally
Aftermarket accessories or previous repairs that disturbed wiring

Symptoms

Rear right window inoperative (no movement)
Blown fuse(s) or recurring fuse failure for window circuit
Burning smell near door or switch area or visible heat on switch/motor
Other power window functions may be normal or intermittent
Control module stores B1425 and may disable that window circuit

What to check

Inspect fuse(s) for the power window circuit and note if repeatedly blown
Visually inspect rear right door wiring harness, connectors, and grommet (door hinge area)
Check for melted insulation, exposed conductors, or corrosion at connectors and switch
Measure voltage at window switch and motor connector with connector disconnected
Scan module for freeze-frame data and related or supporting DTCs
Listen for motor humming or relay clicking when switch is operated

Signal parameters

Key ON, engine OFF: control module output to motor should be near 0 V when inactive (high-impedance) and switchable to battery voltage (~12 V) or ground depending on system design
When activating window UP or DOWN: motor supply should switch to battery voltage on one terminal and ground on the other (typical 0–12 V on each terminal depending on direction)
Short-to-ground condition: measured voltage at motor drive output will be near 0 V even when module commands battery voltage, or excessive current draw (>5–15 A depending on motor) may be seen
Resistance: motor winding resistance typically low (a few ohms); an internal short may read very low/near 0 ohms or show short to motor housing (infinite to housing normally)

Diagnostic algorithm

Retrieve freeze-frame and related DTCs. Note whether DTC is current or historical and any pattern (e.g., present only with door open).
Visually inspect the RR door harness, grommet, connectors (at door and body), and switch for damage, corrosion, or pinched wires. Repair any obvious damage.
With ignition ON, attempt to operate the RR window while monitoring the fuse. If fuse blows immediately, suspect a hard short—disconnect the motor to isolate.
Disconnect the RR window motor connector. Check for short to ground on the motor power circuits using an ohmmeter between each motor terminal and chassis ground. A direct short (near 0 Ω) indicates motor or wiring shorted to chassis.
Back-probe the motor-side connector at the body (with motor disconnected). Command the window up and down and measure voltage on the module side outputs. Confirm the module is commanding the expected voltages (battery or ground). If module output is commanded but voltage stays near 0 V, check wiring for short to ground between module and motor.
Perform a continuity/short check from the module output pin to chassis ground with the connector disconnected (pin-to-ground). If short present, isolate sections of harness by disconnecting intermediate connectors or pulling door harness through hinge to locate damage.
If wiring checks good and motor connector shows no short, bench-test the motor by applying 12 V/ground externally through an inline fused jumper. If the motor draws excessive current or there is evidence of internal short (smoke, overheating), replace the motor.
If motor and wiring are good, suspect the window control module/switch. Test switch outputs and look for internal short to ground. Replace or repair the switch/module as required following manufacturer procedures.
After repairs, clear DTCs, operate the window through full travel several times and re-scan to confirm the DTC does not return. Replace any repeatedly failing fuses with correct rating and inspect cause before replacing fuse.

Likely causes

Frayed wiring where the harness passes through the door hinge (most common for door-related shorts)
Motor windings shorted to motor housing (motor internal short)
Switch contact melted or shorted to ground owing to moisture or contamination
Connector pin pushed out and contacting door metal or body ground
Window regulator hardware contacting wiring causing abrasion and short