Indicator Problem

[Squad]

Hi, When I put my Indicators on some times they work as they should and sometimes they blink faster than normal, I've put the hazards on and they work perfectly and all the bulbs work as they should, So does anyone have any ideas what would be causing the interment blinking of my Indicators sometimes fast and then sometimes normal?
any help would be grateful.

[evdama]

Dodgy /corroded bulb holder ,fractured wiring??