Can you turn up brightness on clock in car?

I have an old 91 Ford Escort and it's hard to see the clock cause the display seems dim. Is there a way make it brighter?

Try putting in a light bulb that uses more power.

It depends on if it was or is a factory clock!
The headlight switch to turn the lights on and off also has a rheostat in it for instrumentation brightness. Try adjusting that. I'm not sure if there's only one bulb or two. These do age and loose brightness and if there was more then one, one might be burnt out. Getting into where they are at will be the problem.

Buy a car clock powered by the cigarette lighter. Mount it on the dashboard. Or buy a smartphone mount. Mount your smartphone set to the clock app.

Probably not. I had a car once that had a dimmer switch for the gauges.