B1447

Code

Other B — Body

Wiper Park Sense Circuit Open

Brand: Other

Type: B — Body

Views: UK: 23 EN: 31 RU: 27

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Open or broken wire in the wiper park sense circuit
Disconnected, corroded or damaged connector at the wiper motor or control module
Faulty park switch inside the wiper motor assembly
Poor or missing ground for the park circuit
Blown fuse or faulty relay supplying the wiper control circuit
Faulty body control module (BCM) or wiper control module

Symptoms

Wipers fail to return to park position after being switched off
Wipers stop mid-swipe or in an odd position
Wipers operate intermittently or not at all
Front wiper indicator may not match actual wiper position
Stored B1447 code without other powertrain faults

What to check

Read and record all stored codes and freeze frame data with a scan tool
Verify battery voltage is within normal range during tests
Inspect fuses and wiper relay for continuity and correct operation
Visually inspect wiper motor connector and harness for damage, corrosion, or pin push-out
Perform wiggle test of wiring while operating wipers to spot intermittent opens
Check for Technical Service Bulletins (TSBs) related to wiper/BCM

Signal parameters

Park sense circuit expected behavior: changes state when wipers reach physical park position (logic type varies by vehicle)
Common expected voltages: inactive ~12 V (or open), active ~0 V (ground) OR logic levels ~0–5 V depending on module design — verify vehicle-specific values before relying on them
Continuity: with wipers in park position the park switch is typically closed (continuity to ground) — with wipers out of park it is open (no continuity) on many systems
Measure with respect to chassis ground; use Key ON / Wipers OFF and operate wipers to observe transition

Diagnostic algorithm

Verify customer concern and note wiper behavior. Record any additional codes.
With scan tool, clear code then attempt to reproduce. Note if code returns and under what conditions.
Check battery voltage (should be ~12–14 V). Low voltage can cause erratic signals.
Inspect fuse(s) and wiper relay; replace if faulty.
Visually inspect wiring and connectors at the wiper motor and BCM for corrosion, bent pins, or damage. Repair as needed.
Back-probe the park sense wire at the wiper motor connector. With Key ON and wipers OFF, observe the signal; operate wipers through a cycle and watch for the park switch transition when the wipers reach the parked position.
Perform continuity check between the park sense terminal at the wiper motor and the corresponding input terminal at the BCM with connector(s) disconnected. An open indicates wiring fault.
If park sense never changes state but wiring is good, bench-test or replace the wiper motor/park switch assembly.
If motor and wiring test good, test the BCM input for proper reference voltage and ground. If the BCM input is not functioning, consider BCM diagnosis/replacement following manufacturer procedures.
After repairs, clear codes, perform a functional test and road test to confirm wipers park correctly and code does not return. Document repairs.
Safety note: disconnect battery when repairing wiring or replacing modules per vehicle service instructions.

Likely causes

Open/damaged park sense wire between wiper motor and module (most common)
Corroded/loose connector at wiper motor
Failed park switch inside the wiper motor assembly
Intermittent connector contact or broken pin
Less likely: failed BCM input or internal module fault

Fault status

⚠️ Status

B1447 — Wiper Park Sense Circuit Open. The body/wiper control module did not detect the park position signal from the wiper motor/park switch (open circuit). This may prevent wipers from recognizing or returning to the parked position.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours