B1395

Code

FIAT B — Body

Electric door memory locking relay short to ground

Brand: FIAT

Type: B — Body

Views: UK: 2 EN: 4 RU: 5

AI status

Completed

ready

Completed 100%

Page language: EN

Read and record freeze frame / freeze data and related codes with a scan tool
Visual inspection of relay, fuse and relay socket for burns or corrosion
Inspect door harness through hinge area for chafing, pinching and water damage
Check for aftermarket alarm or actuator taps on the same circuit
Measure voltage at relay feed and control pin with key on and while actuating locks
Perform resistance-to-ground checks from suspect circuit to chassis ground

Relay coil supply: nominal battery voltage (~12 V) when fuse/ignition present
Control signal: BCM drives relay coil (0 V to supply voltage to energize depending on design)
Short-to-ground symptom: very low resistance to chassis ground (
Open/normal coil resistance: typical small automotive relay coils often 50–200 ohms (manufacturer-specific)
Fuse current: increased or short-circuit current when short present; fuse may blow immediately

Confirm code and attempt to reproduce symptom. Note when code sets (locking attempt, key cycle).
Visually inspect relay area, fuse box and connectors for heat damage, corrosion or water ingress.
With ignition off, disconnect relay and measure resistance between the relay feed/control terminal and chassis ground. A low resistance (
If no short with relay removed, reconnect relay socket and backprobe feed and coil control while actuating locks. Verify supply voltage present and whether control line is being pulled to ground by BCM as expected.
Swap the suspect relay with an identical known-good relay and clear codes. If fault does not return, replace relay.
If short persists with relay removed, isolate wiring by disconnecting door module(s) or removing connectors in sections until the short disappears; inspect/repair the section where the short is found.
Inspect/repair any chafed wires through the door hinge boot and repair with solder and protective sleeving or replace harness as required.
If wiring and relay are good, test BCM output driver with manufacturer-specific procedures; replace BCM only after verifying external circuit integrity and ruling out wiring/relay faults.
After repairs, clear codes and perform functional test cycles for locking/memory. Re-scan to confirm code does not return.

Damaged relay (stuck internally or coil shorted to ground)
Pinched/chafed wire in door harness shorting to body ground near hinge
Corroded connector at relay or door module causing low-resistance path to ground
Shorted accessory or retrofit wiring tied into door lock circuit
Faulty BCM driver transistor (less common)

⚠️ Status

Electric door memory locking relay circuit — short to ground detected. Service required to locate short or faulty component.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email