Vp 5litre earth problem help

[Xpig5L]

Ok so I start the car runs fine put my blinker on and it’s fine turn my headlights on with my blinker and the blinker stays on and headlight and tailight flash in sinc of what the blinker should be doing please help cheers

 

[vc commodore]

Check the earths to the headlights...From crappy memory, the blinkers and headlights share the same earth at the front