B1448

Code

Other B — Body

Wiper Park Sense Circuit Short To Battery

Brand: Other

Type: B — Body

Views: UK: 35 EN: 42 RU: 43

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Damaged wiring or chafed insulation with conductor contacting a battery-fed circuit
Shorted park sense wire to fused B+ (accessory/battery feed)
Corroded or pushed-pin connector making unintended contact with B+
Failed wiper motor internal park switch that ties the sense circuit to battery
Aftermarket accessory or recent repair introduced a wiring splice or error
Faulty body/control module (less common)

Symptoms

Wipers do not return to park position or stop in the correct place
Intermittent or complete loss of intermittent/parked wiper function
Wipers may run continuously or behave erratically
Related fuse may blow or other circuits fed from the same feed may show issues
Associated fault lamp or message in body/control module

What to check

Retrieve freeze frame and stored data; confirm B1448 is current and note conditions (ignition state, wiper switch position).
Visual inspection of wiring harness from IP/relay box to wiper motor for damage, pinched sections, aftermarket splices, or rodent damage.
Inspect connectors at wiper motor and body control module for corrosion, loose pins, or evidence of B+ contact.
Check related fuses and relays for signs of heat or damage.
Measure voltage at the park sense terminal with connector disconnected and ignition in the same state that set the code.
Perform wiggle test on harness while monitoring the park sense voltage to reproduce fault.

Signal parameters

Battery voltage reference: nominal 11–14.5 V (engine off/on charging state).
Expected park sense behaviour: signal should change state (open/ground or switch between ~0 V and B+) when wipers move to park; exact polarity varies by design.
Fault condition: park sense conductor reads battery voltage (approx B+) when it should be low/open or grounded, indicating a short to B+.
With connector disconnected, park sense circuit should not be tied to B+ — reading B+ with connector off indicates upstream short or module fault.

Diagnostic algorithm

Read and record DTC and freeze frame details. Clear code and attempt to re-create the fault to confirm it is current.
Visually inspect harness and connectors between the body/control module and the wiper motor for damage, corrosion, or aftermarket splices. Repair obvious damage.
With ignition in the state that produced the code, backprobe the park sense pin at the wiper motor connector. Observe voltage. If battery voltage present when park should be low, there is a short to B+.
Disconnect the wiper motor connector and measure the park sense pin again at the harness side. If still at B+, trace wiring toward the module to find the short (inspect intermediate connectors, junctions, fuse/relay boxes).
If the harness reads OK (no B+ at disconnected harness), reconnect harness and test the wiper motor assembly by bench-testing or replacing the motor to isolate an internal park switch failure.
Repair or replace damaged wiring, repair connector pins, secure and insulate exposed conductors, or replace the wiper motor assembly if internal short is confirmed.
After repairs, clear codes and perform full functional test of wiper park operation through several cycles and re-scan for DTC recurrence.
If wiring and motor check good but B+ still present at module pin with connector disconnected, consider a module fault and follow manufacturer procedures for module testing/replacement.

Likely causes

Park sense wire shorted to a fused 12 V feed due to damaged harness near wiper motor or under-hood routing
Connector pin bent or corrosion causing contact with battery feed pin
Wiper motor assembly internal switch failed and is shorting the sense lead to B+
Incorrect wiring from prior service or accessory install

Fault status

⚠️ Status

Wiper Park Sense Circuit Short To Battery — control module detects park sense circuit tied to battery voltage; may prevent correct wiper park detection.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2 hours