What Does B2350 Mean?
This code indicates that the Body Control Module (BCM) has detected an abnormal voltage condition in the steering column switch circuit, specifically a short circuit to battery voltage (B+). The steering column switch assembly typically includes controls for turn signals, wipers, cruise control, and high beams. The BCM detected voltage on a control circuit when it should have been at ground or a lower reference voltage, indicating unwanted power is feeding into the circuit.
Common Causes
45%
Damaged or chafed wiring harness in steering column causing short to power wire
30%
Faulty multifunction switch or combination switch with internal short circuit
15%
Corroded or damaged connector pins at steering column switch allowing cross-circuit contact
10%
Water intrusion or moisture in steering column causing electrical bridging between circuits
Diagnostic Steps
1
Step 1: Perform visual inspection of steering column covers and remove upper and lower column shrouds. Examine all wiring harnesses for chafing, pinch points, or damage especially where harnesses route around tilt/telescoping mechanisms. Look for evidence of previous repairs, aftermarket installations, or water intrusion.
2
Step 2: Disconnect the multifunction switch connector at the steering column. Using a digital multimeter, measure voltage on each circuit pin at the harness side (vehicle side) with ignition on. All control signal circuits should read 0V or close to ground; any circuit showing battery voltage (12-14V) confirms a short to power in the harness.
3
Step 3: If no voltage found at connector with switch disconnected, measure resistance between each switch circuit pin and battery positive terminal with ignition off and battery connected. Any reading below 10k ohms indicates a short to battery. If circuits test normal, the fault is internal to the switch assembly itself.
4
Step 4: Inspect the multifunction switch connector terminals for corrosion, bent pins, or signs of overheating. Check connector housing for damage that could allow terminal-to-terminal contact. Clean terminals with electrical contact cleaner and verify proper pin seating.
5
Step 5: If wiring harness short is identified, trace the affected circuit through the steering column to locate the exact damage point. Pay special attention to areas where harness flexes during steering wheel adjustment or where it may contact metal edges or mounting brackets.
6
Step 6: After repair (harness repair, connector replacement, or switch replacement), clear codes and perform functional test of all steering column switch functions. Verify code does not return and BCM shows normal circuit operation in live data stream. Cycle ignition multiple times and operate all switch functions to confirm repair.
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected an abnormal voltage condition in the steering column switch circuit, specifically a short circuit to battery voltage (B+). The steering column switch assembly typically includes controls for turn signals, wipers, cruise control, and...
The most common cause of B2350 (Steering Column Switch Circuit Short to Battery) is: Damaged or chafed wiring harness in steering column causing short to power wire
Typical repair costs for B2350 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle may be driven with caution, but critical safety functions like turn signals, hazard lights, or windshield wipers may be inoperative or function intermittently, creating significant safety risks. Repair should be completed promptly, especially if turn signals are affected, as this creates a hazard to other drivers.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2350 to identify the root cause.
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Quick Info
Category
Body
System
Body Control System / Steering Column Switches
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
