Blinker issues

So my blinkers are being tricky. During the day my left blinker won't work sometimes when I apply my brakes. When at night with my headlights on the left blinker won't work at all. Is it a faulty ground? Bad switch? Please help.

Check your earths before you do anything else.
When something stops workin when something else is switched on, it is usually due to bad earths.
It might help if we knew the year and model ...

Apologies. It's a 1990 D90. Literally I turn off the head lights running lights combo switch and the blinker starts to work. I thought I found the broken ground which is from the engine to the body on the left side of
The engine. I did not get it attached just yet
But will do it tomorrow. But there are some days it will work. Would it be the switch itself? I have a new one. Please help.

Oldseadog said:

Check your earths before you do anything else.
When something stops workin when something else is switched on, it is usually due to bad earths.
It might help if we knew the year and model ...

Click to expand...

1990 D90. RHD. Thought I found the earth which is a broken one on the left side of the engine to the body. I still have to connect it but it's worked before when I had My head lights on and again today it worked for one turn. Would IT be the switch itself? I have a new one.

I'm spaced out on morphine at the moment, and can't think straight, but I will get back to you when I can.

Oldseadog said:

I'm spaced out on morphine at the moment, and can't think straight, but I will get back to you when I can.

Click to expand...

Hope you get well and I'll be looking out for it.