Fiat Punto boot release not working

Worth checking fuse .

Door locking/unlocking motors, dead lock activation motors, boot unlocking motor 4 20


Fiat Punto Evo (2010 – 2012) – fuse box diagram
Year of production: 2010, 2011, 2012

Fuse location
The fuses are grouped in three control units: on the dashboard, in the engine compartment and in the left-hand side of the boot.

Dashboard fuse box
Fiat Punto Evo - fuse box - dashboard
Fiat Punto Evo – fuse box – dashboard
Device Fuse Ampere rating [A]
Right dipped beam headlight 1 7,5
Lift dipped beam headlight, headlamp alignment corrector 8 7,5
INT/A supply for switch coils on engine fuse box and switch coils on body computer control unit 13 5
Front ceiling light, rear ceiling light, visor lights, door marker lights, boot light, glove box light 2 5
Supply and battery for EOBD diagnostic plug, automatic climate control system control unit, alarm, sound system, convergence control unit 5 10
INT supply for instrument panel, switch on brake pedal (N.O. contact), third brake light 11 5
Door locking/unlocking motors, dead lock activation motors, boot unlocking motor 4 20
Windscreen/rear window washer pump 6 20
Electric window motor on driver-side front door 14 20
Electric window motor on passenger-side front door 7 20
INT supply for dashboard control lights, parking control unit, tyre pressure measurement control unit, electric wing mirror movement, rain sensor, sunroof control unit, My Port infotelematic system socket, electric rear view mirror 12 5
Instrument panel 3 5
INT supply for brake pedal switch (NC contact), clutch pedal switch, interior heating unit, convergence control unit, sound system capabilities, voltage stabiliser control unit, reverse light on rear bumper, water sensor on diesel filter, glow plug heating control unit, airflow meter, brake booster sensor, switch coils on engine compartment fuse box 10 7,5
* Fuse on some versions only
Engine compartment fuse box
Fiat Punto Evo - fuse box - engine compartment
Fiat Punto Evo – fuse box – engine compartment
Device Fuse Ampere rating [A]
Hi-Fi sound system with control unit and subwoofe 09 20
Single tone horn 10 10
Left main beam headlight, right main beam headlight 14 15
Additional heater PTC1 15 30
Air conditioning compressor 19 7,5
Heated rear window 20 30
Fuel pump on tank 21 15
Left fog light, right fog light 30 15
CNG methane system management solenoid valves 84 7,5
Socket (ready for use) 85 —
Passenger compartment socket, cigarette lighter 86 15
Battery charge status sensor 87 5
De-mister on driver-side wing mirror, de-mister on passenger-side wing mirror 88 7,5
Boot fuse box
Fiat Punto Evo - fuse box - luggage compartment
Fiat Punto Evo – fuse box – luggage compartment
Device Fuse Ampere rating [A]
Sunroof opening system 17 20
Alarm system management control unit 14 7,5
Spare 01 —
Spare 03 —
Electric lumbar movement on driver’s seat 04 10
Spare 15 —
Electric windows system (motor, control unit) on right-hand door 10 20
Spare 16 —
Driver’s seat heater control unit 08 10
Tow hook system (capability for after-sale fuse assembly) 07 —
Boot socket 05 15
Electric windows system (motor, control unit) on left-hand door 11 20
TPMS (tyre pressure monitoring system) control unit 13 5
Front passenger seat heater control unit 09 10
Spare 06 —
Spare 02 —
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Many thanks for your reply, I will investigate this weekend. Is it possible that the relay can have an intermittent fault because if I disconect the wring to the lock it will operate once, maybe twice and then it stops working again?
Thanks Andrew

On some cars the wiring where it enters at top of boot / tailgate in rubber sheath can get damaged causing intermittent fault or inop , dependent if wires touching or not .If it has a relay , always possible it could be sticking