Is it possible that my dashboard lights flicker on and off beacause of my altanator

If all the lights are flickering. I would suggest that you only go as far as locating the fuse. Clean it and put back. Alternatively replace with new fuse. It's unusual for all lights to flicker. 1 might flicker, indicating a faulty bulb. On Toyotas, the dash lights are usually on the same fuse as the park lamps.

Possible bad connection on the battery?

Having exact same problem. Dashboard lights for fan speed & Temp. setting flickering & power windows slow when closing. Happened same time.

I would check your fuse board for a loose fuse or wire to it from the battery as sometimes vibration loosens terminals eric

sounds like your having a problem with the ignition. its not shutting power off completly.

Have a look at the dashboard lights dimmer switch. That switch, losing contact momentarily while the lights are on, will cause the lights to flicker.

It is caused usually when the arternator is going bad

behind your instrument cluster there a molly plug that plugs into the back of the dash unit! its probably lose or has a bad ground

if the battery light won't go of after replacing the battery you have a bigger issue, chances are the altanator is not putting out enough voltage. I would have that check as soon as possible, that way you don't die on the road. when the car is running the altanator should be putting out 14.6 volts at all times, if it is below 13 then the altanator should be replaced.

posabilatey a bad earth