Outer Limits 4x4 Board

I was driving home from work today and I noticed 4 of my dash lights were flickering on and off.
The lights were: Green turbo light, Red turbo light, Battery light and water sedimenter light.
They were all flickering at the same time and the engine was still running fine. Has anyone seen this before or have any idea why this is happening?

It's a 1991 80 series Sahara with the 1HD-T motor.

Thanks

Get your alternator checked. Seems like it will be time for an overhaul/replacement soon.

first thing to do is check that the plug at the back of the alternator is clean and securely clipped in. A bad connection with these is common on 80series