B2697

Code

HUMMER B — Body

Headlamp Washer Request Circuit

Brand: HUMMER

Type: B — Body

Views: UK: 11 EN: 13 RU: 7

AI status

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Page language: EN

Causes

Blown fuse or faulty relay for the washer/lighting circuit
Open or shorted wiring in the headlamp washer request circuit
Corroded or loose connector at washer pump, valve, switch, or module
Faulty headlamp washer switch or multifunction switch
Failed washer pump, valve, or solenoid
Body control module (BCM) or headlamp washer module internal fault

Symptoms

Headlamp washers do not deploy when activated
Windshield washers may operate normally while headlamp washers do not
DTC B2697 stored in BCM or body module
Possible erratic operation of headlamp washer (works intermittently)
No audible pump sound when headlamp washer selected

What to check

Use a scan tool to read/clear codes and to command the headlamp washer on/off while monitoring data
Inspect fuses and relays for the washer and lighting circuits
Visually inspect wiring and connectors at the headlamp washer pump/valve and BCM for corrosion, damage, or loose pins
Check for voltage at the headlamp washer connector with switch activated
Perform continuity checks between the request switch/module and the washer connector
Check ground integrity at washer pump/valve ground point

Signal parameters

Request signal: should change state when headlamp washer is commanded (either ~12 V switched or switched to ground depending on vehicle design)
Rest state: typical 0 V (ground) or battery voltage if open-circuit; confirm with wiring diagram
Active state: near battery voltage (11–14 V) or near 0 V if it is a ground-switched circuit
Pump current draw (when running): typically low-amp motor draw — expect a measurable current rather than open circuit (use vehicle-specific specs)
Continuity: low resistance between connectors when wiring intact (< a few ohms to expected wiring resistance); open/infinite indicates break

Diagnostic algorithm

Connect a capable scan tool. Read freeze frame and DTCs; attempt to command headlamp washer ON while monitoring request status.
Verify fuse(s) and relay(s) for washer circuits are present and functional. Replace suspect items and recheck.
With ignition ON, operate the headlamp washer command while measuring voltage at the washer pump/valve connector. Note whether the request pin changes state.
If no request voltage change, trace/back-probe the wiring back to the BCM or switch. Check continuity and for short to battery or ground.
Inspect and clean connectors. Repair or replace damaged connector pins or harness sections. Protect repairs against moisture.
Bench-test the washer pump/valve by applying fused 12 V to confirm mechanical operation and that current draw is within expected range. Replace if inoperative or draws excessive current.
If wiring and pump test good but no request signal, test/replace the headlamp washer switch or verify BCM output using wiring diagram; check for BCM software updates or known issues.
After repair, clear codes, perform multiple activations to confirm correct operation and no return of B2697.

Likely causes

Connector corrosion at washer pump or BCM
Broken wire or chafed harness in front bumper area
Failed washer pump/solenoid drawing abnormal current or open circuit
Blown fuse protecting washer/headlamp washer circuit
Control module not seeing the request due to internal module failure

Fault status

⚠️ Status

The body control module detected an open, short, or missing command signal on the headlamp washer request circuit. The module did not see the expected request while monitoring the circuit and stored the B2697 code.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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