OBD-II Fault Code

B1477: Wiper Hi/Low Circuit Motor Short To Ground

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for B1477.

System family

Body

Manufacturer-specific

Repair category

Electrical circuit / sensor

Use this category to narrow your checks before replacing parts.

Severity

Medium

Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.

What B1477 usually means

Wiper Hi/Low Circuit Motor Short To Ground.

Common symptoms

Body/accessory warning lamp or feature not working

Likely causes

Wire shorted to chassis/ground; Internal component short; Low signal voltage; Weak power supply; High resistance/poor ground; Failed sensor

Diagnostic checks

Check related fuses, connectors, grounds and switch/module power supply; Inspect harness for rubbing/pinch points and check resistance to ground; Check sensor reference voltage, ground and signal voltage

Repair guidance

Repair insulation/harness damage or replace internally shorted component; Repair poor ground/power feed or replace confirmed faulty sensor

Verification after repair

Operate the affected body/accessory system and rescan

Note: Confirm vehicle make/model/year because manufacturer-specific codes can vary; Manufacturer-specific: confirm definition and test steps in the vehicle service manual. A DTC identifies a circuit or system condition, not always the failed part.