Hi I have a mitsUBISHI L200 1986 with 4 headlights. The inside pairs are staying on when i put it on dip CAN YOU GIVE ME ANY HINTS ANY INFO THANK YOU

Make: Mitsubishi
Model: L200
Year: 1986
Engine: 4G63B

Already Tried:
I have taken the stalks etc off steering wheel to look at mechanism appears to be working ok, Managed to get the flasher on lights to work, hasn't for a while. I think it is the relay thing because it appears to not switch them off, but I can't get a new one to try