2015 custom tailgate lock

[Jezza61]

The tailgate opening 'button' under the number plate light bar is intermittent in that I have to slam the tailgate closed hard or hit the number plate light bar for it to work. Not sure if this is a faulty switch, adjustment of the closing mechanism (for it to recognised closed?) or a need of lubrication to the closing device? Any thoughts / experience gratefully received

[Jezza61]

So .......
Bought and replaced push button switch in tailgate handle ...... no difference
Removed and tested electric acuator - Small motor, worm drive, and micro switch. Operating release mechanism. No different
Noted only seems to have 7V ?? but this is consistent 7V and sometimes works and sometimes doesnt ..... Surely if it works with 7V sometimes then it will all the time?
Found connection block in tailgate (three wires in / out) which seems dodgy - held together with cable tie! Bit of fiddling seems to fix problem so cut out connection block and connected up three wires with crimped connections ....... seems to have fixed it Reassembled all mechanisms ...... working a treat ..... over and over again hearing it activate with door open
Closed door ..... back to nothing - no sound of any activation

Arrrrrrgh ...... I guess I am down to dodgy connection somewhere along the wiring of either live feed (constant live); Actuator signal circuit closed by operating new switch); or poor earth?

Any ideas / experience gratefully received

[dunf]

Where the loom comes into the tailgate from the body of the van at the top of the tailgate near side. On older hatchback cars i've had - the weak point is always where the loom flexes during the opening / closing cycle. The wires are subject to breaking in these areas. Maybe cut the flexi cover and have a look?