B1824

Code

Other B — Body

Wiper Rear Park Sense Input Circuit Short To Battery

Brand: Other

Type: B — Body

Views: UK: 22 EN: 33 RU: 18

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Page language: EN

Scan for stored codes and freeze frame data; check for related wiper or body module codes
Visual inspection of rear wiper motor, connector, wiring loom, and body grommets for damage, corrosion, or water intrusion
Backprobe the park sense wire at the rear wiper motor connector and at the control module/BCM connector
Check for battery voltage present on the park sense circuit when ignition/key is ON and wiper is in parked state
With ignition OFF, check continuity between the park sense circuit and battery positive (should not be low resistance)
Wiggle harness while watching live data and voltages to reproduce intermittent shorts

Expected: park sense circuit should change state between near 0 V (ground) and near battery voltage depending on design — consult vehicle wiring. Typical: ~0 V when park switch indicates parked, ~12 V when not parked.
Fault condition: park sense measuring constant battery voltage (~12 V) when it should be low/grounded.
Likely current: small signal circuit current; low resistance to battery positive indicates short (measurable continuity with battery disconnected).

Retrieve B1824 and any related codes; record freeze frame/live data for park sense.
Perform a careful visual inspection of the rear wiper motor, connector, boot, and wiring route for chafing, damage, or corrosion. Repair obvious damage.
Backprobe the park sense wire at the rear wiper motor connector with ignition ON and wiper OFF. Observe voltage/state. Note if voltage matches expected parked state or is stuck at battery voltage.
If park sense is at battery voltage at the motor, disconnect the rear wiper motor connector. Recheck the park sense voltage at the harness side with connector disconnected. If voltage returns to expected (no battery voltage), the motor/park switch is likely shorted — replace motor.
If battery voltage remains on the harness with motor disconnected, trace harness toward the body/BCM. Inspect for pin‑to‑pin shorts, damaged insulation, or contact with battery feed wires or body. Repair wiring and connectors as needed.
With ignition OFF and battery disconnected for safety, measure resistance between the park sense circuit and battery positive to confirm short. Also check resistance to ground to rule out other shorts.
If harness and motor check good, backprobe the BCM/input at the module connector. If the module is supplying voltage incorrectly (internal short), consider module replacement only after confirming wiring and motor are good.
Clear codes, perform function test and road test to verify repair. Re-scan for codes to confirm fault does not return.

Wiring harness rubbed through and contacting a 12V source at rear of vehicle
Corroded/contaminated rear wiper connector allowing positive feed to contact the park sense pin
Faulty rear wiper motor with internal park switch shorted to battery