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Home / DTC / B1C47 — Front wiper switch

B1C47 — Front wiper switch

Detailed page for trouble code B1C47.

34,405codes
59brands
11,914generic
22,491specific
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Code

B1C47

LAND ROVER B — Body

Front wiper switch

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty front wiper switch (mechanical/electrical wear or internal contact failure)
  • Damaged or corroded connector at the switch
  • Broken, shorted or high-resistance wiring between switch and body control module (BCM) or wiper module
  • Loss of supply or ground to the switch (blown fuse, poor ground)
  • Intermittent CAN/LIN communication fault or module software fault
  • Water ingress or contamination in switch assembly

Symptoms

  • Front wipers inoperative or operate only on some positions
  • Wipers stuck in a single speed or park position
  • Intermittent wiper operation or loss of intermittent/auto wipe function
  • Instrument cluster or message center may show a wiper system warning
  • Related DTCs for wiper motor, BCM or communications may be present

What to check

  • Read and record all stored and pending DTCs with a capable scan tool; note freeze frame and occurrence count
  • Visually inspect the front wiper switch, steering column area and connector for corrosion, damage or water entry
  • Check fuses and relays for the wiper circuit and replace if blown
  • Wiggle-test wiring and connector while monitoring live data to reproduce fault or intermittent behavior
  • Check for related communication DTCs (CAN/LIN) and verify network integrity
  • Measure supply voltage and ground at the switch connector with a multimeter

Signal parameters

  • Switch supply voltage: nominal battery voltage ≈ 11–14 V with key on
  • Switch ground: near 0 V with good chassis ground; continuity to chassis expected
  • Switch output circuits: closed switch positions should show low resistance (near 0–2 ohms) or direct supply voltage; open positions show high resistance/infinite
  • Intermittent/auto signal: may be a variable voltage or pulsed signal depending on model; monitor live data/inputs with OEM scan tool
  • CAN/LIN: expected presence of switch status messages on the network; absence or invalid data indicates comms/module issue
  • Wiring continuity: continuity for signal circuits; expected insulation resistance high (no shorts to battery or ground)

Diagnostic algorithm

  1. Connect a full-function scan tool, read all fault codes and live data. Note occurrence, freeze frame and any related codes.
  2. Attempt to reproduce the fault by operating the wiper switch through all positions while observing live input/state for the switch and wiper motor responses.
  3. Visually inspect the switch assembly and connector for moisture, corrosion, bent pins or damage. Repair or clean as required.
  4. Check fuses/relays for the wiper system and verify proper supply voltage to the switch connector (key on) and a good ground reference.
  5. With ignition on, backprobe the switch connector and measure supply, ground and signal voltages while operating the switch. Compare to expected values (battery voltage on supply, near 0 V on ground, signal changes with switch).
  6. Perform continuity/resistance checks between switch outputs and the BCM/wiper module connectors to identify open or high-resistance wiring (disconnect battery if required by procedure).
  7. If suspecting an intermittent or CAN/LIN communication issue, monitor the network for errors and check for other modules reporting loss of comms. Perform module reboots or software checks per OEM guidance.
  8. If bench testing the switch is possible, confirm switch contact continuity in each position. Replace switch if contacts fail or are intermittent.
  9. If wiring, connector and switch appear good but the fault persists, test/replace the BCM or wiper control module or consult OEM service info for reprogramming/flash procedures.
  10. After any repair, clear codes and re-test to confirm the fault does not return and normal wiper function is restored.

Likely causes

  • Corroded connector or water ingress at the steering column switch assembly
  • Open or short in the harness between the switch and BCM
  • Switch internal contact failure (common with high-mileage vehicles)
  • Blown fuse or poor ground for wiper/switch circuit
  • Intermittent module communication or software error (less common)

Fault status

⚠️ Status
Front wiper switch circuit fault detected (input invalid or missing). Inspect switch, wiring, connectors and control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1C46 B1C48 B1C40 U0100 U0121
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

B1C47

MITSUBISHI B — Body

PS.pretensioner circuit low

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty front wiper switch (mechanical/electrical wear or internal contact failure)
  • Damaged or corroded connector at the switch
  • Broken, shorted or high-resistance wiring between switch and body control module (BCM) or wiper module
  • Loss of supply or ground to the switch (blown fuse, poor ground)
  • Intermittent CAN/LIN communication fault or module software fault
  • Water ingress or contamination in switch assembly

Symptoms

  • Front wipers inoperative or operate only on some positions
  • Wipers stuck in a single speed or park position
  • Intermittent wiper operation or loss of intermittent/auto wipe function
  • Instrument cluster or message center may show a wiper system warning
  • Related DTCs for wiper motor, BCM or communications may be present

What to check

  • Read and record all stored and pending DTCs with a capable scan tool; note freeze frame and occurrence count
  • Visually inspect the front wiper switch, steering column area and connector for corrosion, damage or water entry
  • Check fuses and relays for the wiper circuit and replace if blown
  • Wiggle-test wiring and connector while monitoring live data to reproduce fault or intermittent behavior
  • Check for related communication DTCs (CAN/LIN) and verify network integrity
  • Measure supply voltage and ground at the switch connector with a multimeter

Signal parameters

  • Switch supply voltage: nominal battery voltage ≈ 11–14 V with key on
  • Switch ground: near 0 V with good chassis ground; continuity to chassis expected
  • Switch output circuits: closed switch positions should show low resistance (near 0–2 ohms) or direct supply voltage; open positions show high resistance/infinite
  • Intermittent/auto signal: may be a variable voltage or pulsed signal depending on model; monitor live data/inputs with OEM scan tool
  • CAN/LIN: expected presence of switch status messages on the network; absence or invalid data indicates comms/module issue
  • Wiring continuity: continuity for signal circuits; expected insulation resistance high (no shorts to battery or ground)

Diagnostic algorithm

  1. Connect a full-function scan tool, read all fault codes and live data. Note occurrence, freeze frame and any related codes.
  2. Attempt to reproduce the fault by operating the wiper switch through all positions while observing live input/state for the switch and wiper motor responses.
  3. Visually inspect the switch assembly and connector for moisture, corrosion, bent pins or damage. Repair or clean as required.
  4. Check fuses/relays for the wiper system and verify proper supply voltage to the switch connector (key on) and a good ground reference.
  5. With ignition on, backprobe the switch connector and measure supply, ground and signal voltages while operating the switch. Compare to expected values (battery voltage on supply, near 0 V on ground, signal changes with switch).
  6. Perform continuity/resistance checks between switch outputs and the BCM/wiper module connectors to identify open or high-resistance wiring (disconnect battery if required by procedure).
  7. If suspecting an intermittent or CAN/LIN communication issue, monitor the network for errors and check for other modules reporting loss of comms. Perform module reboots or software checks per OEM guidance.
  8. If bench testing the switch is possible, confirm switch contact continuity in each position. Replace switch if contacts fail or are intermittent.
  9. If wiring, connector and switch appear good but the fault persists, test/replace the BCM or wiper control module or consult OEM service info for reprogramming/flash procedures.
  10. After any repair, clear codes and re-test to confirm the fault does not return and normal wiper function is restored.

Likely causes

  • Corroded connector or water ingress at the steering column switch assembly
  • Open or short in the harness between the switch and BCM
  • Switch internal contact failure (common with high-mileage vehicles)
  • Blown fuse or poor ground for wiper/switch circuit
  • Intermittent module communication or software error (less common)

Fault status

⚠️ Status
Front wiper switch circuit fault detected (input invalid or missing). Inspect switch, wiring, connectors and control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1C46 B1C48 B1C40 U0100 U0121
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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