Tail lights only works with a tap

[Ajin]

Every time I turn on the lights, need to tap over the rear parking lights to turn them on. Both of the rear parking lights got the issue but all other lights are working fine. I checked the fuse, changed the bulb, nothing worked. Please help!

 

[Shared]

Have you checked the bulb holders themselves, the metal parts that hold the bulb captive ? One of mine is dodgy and I think I've read of others having similar problems.

[Bper]

As above ,check holder and cables one may be loose.