B1732

Code

Other B — Body

Seat Driver Rear Down Switch Circuit Short To Ground

Brand: Other

Type: B — Body

Views: UK: 20 EN: 31 RU: 28

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Damaged or chafed wiring in the driver seat rear-down switch harness (shorted to chassis ground)
Corroded, loose or bent connector pins at the switch or control module
Failed seat rear-down switch (internal short)
Water intrusion into switch or connector causing a short
Aftermarket equipment or prior repairs with incorrect routing or pinning
Faulty body/seat control module (least common)

Retrieve freeze frame and full DTC list with scan tool; confirm B1732 is current or historic
Visually inspect the driver seat wiring harness, especially where it passes through the seat frame and into the body — look for pinches, abrasion, or exposed conductor
Inspect switch and connector for corrosion, bent pins, water ingress, or debris
Check related fuses and relays for continuity and signs of overheating
Operate the rear-down switch while observing connector and wiring for movement/changes (wiggle test)
Backprobe the switch connector and measure for continuity and voltage with the connector attached and then disconnected

Switch open state: circuit should show high resistance (OL) between switch signal and ground (no intentional short to chassis)
Switch closed (pressed) state: depending on design, the switch typically pulls the signal to ground or to a reference voltage — expect continuity (near 0 Ω) to the switch’s intended reference when activated
With switch disconnected: the signal wire should not show continuity to chassis ground (infinite/very high resistance)
With system powered: reference voltage on the control side commonly ~5 V (logic) or battery voltage on power-switched circuits — consult vehicle-specific wiring diagram

Confirm code and symptom: read codes, note whether B1732 is current. Attempt seat rear-down operation and observe behavior.
Visual inspection: remove trim to access switch/harness. Inspect for damaged insulation, pinched wires, melted insulation or corrosion. Repair any obvious damage.
Check fuses/relays: verify related fuse(s) are intact and correct amperage.
Connector test: disconnect the seat switch connector. With ignition ON, measure resistance between the signal wire and chassis ground. If there is continuity to ground with switch disconnected, the harness is shorted to ground — trace and repair.
Switch bench test: disconnect harness and measure switch continuity. Operate the rear-down switch and verify continuity/open as expected. Replace switch if internal short or incorrect operation is found.
Isolate harness: if short present in harness, disconnect intermediate connectors (seat module, seat heater connectors, junctions) to isolate segment with the short. Repair wiring with proper insulation and routing.
Repair and protect: repair or replace damaged wires/connector pins, apply correct terminals, and ensure grommets and strain reliefs are intact to prevent recurrence.
Re-test: reconnect, clear codes, perform multiple cycles of seat movement to verify code does not return. If code returns after harness/switch verified good, consider vehicle-specific control module testing or replacement per manufacturer guidance.