Code
B3192
HUMMER
B — Body
Window Switch Circuit
Views:
UK: 16
EN: 24
RU: 16
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in the window switch circuit
- Faulty window switch (mechanical or electrical failure)
- Corroded, loose or contaminated connector at the switch or BCM
- Water intrusion or debris in the switch assembly
- Blown fuse or poor fuse/relay connection
- Faulty BCM or related control module (rare)
Symptoms
- Window will not operate from the affected switch
- Intermittent or erratic window operation (works sometimes)
- Other door switch features (illumination, lock/unlock) may be affected
- DTC stored and possibly a generic warning or message on instrument cluster
- Switch LED/illumination not working while others do
What to check
- Retrieve freeze frame and related codes with a scan tool; note which door/switch is indicated
- Visually inspect the switch, door harness, and connectors for corrosion, damage, or water
- Check fuses and relays related to power windows and BCM
- Perform a wiggle test on the door harness while operating the switch to check for intermittent wiring
- Measure battery supply voltage at the switch connector with key on (should be ~12 V)
- Check for a good ground at the switch and BCM ground points
Signal parameters
- Supply voltage to switch: approximately battery voltage (11–14 V) with ignition/accessory on
- Ground continuity: low resistance (
- Switch output: toggles between supply and ground or changes resistance when actuated (dependent on design)
- Diagnostic data: BCM reports switch status bits (on/off) or position values; should change when switch pressed
- Motor/actuator current: normal operating current present when switching to the motor (measured at motor or relay if applicable)
Diagnostic algorithm
- Read and record all DTCs and related U/B codes. Clear codes and attempt to reproduce to confirm persistence.
- Inspect the specific window switch and surrounding area for moisture, corrosion, or physical damage. Replace switch boot/seal if required.
- Verify fuses and relays for the power window circuit; replace any blown fuses and retest.
- With connector disconnected, inspect terminals for corrosion, bent pins, or loose terminals. Clean and repair as needed.
- Probe the switch connector: verify battery feed present with key on, verify ground, and observe switch output while actuating (voltage should change or continuity should appear/disappear per design).
- Perform a continuity test from the switch connector to the BCM input pin with doors in normal position; check for shorts to ground or battery.
- Wiggle the door harness through its full travel while actuating the switch to identify intermittent opens or shorts in the flex section.
- If bench testing, remove switch and test function with a multimeter or substitute known-good switch to confirm failure.
- If wiring and switch test good, check BCM inputs and grounds. If BCM shows no input change while switch is known good and wiring is good, consider BCM fault and consult manufacturer procedures for module testing/replacement.
- After repair, clear codes and verify correct function through multiple full door travel cycles and a final scan for stored codes.
Likely causes
- Corroded or loose connector at the switch (most common)
- Failed window switch assembly
- Wiring open/short between switch and BCM (including pinched wiring in door harness)
- Water ingress into switch assembly
- Intermittent supply voltage or poor ground
Fault status
Status
DTC B3192 stored: Window Switch Circuit fault — control module detected an open/short/intermittent or implausible signal from the window switch input. Investigate switch, connector, wiring, power/ground, and module inputs.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Repair manuals
Manual library for HUMMER
69
Browse 69 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
HUMMER
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email