Headlights not working and dash lights go dim

I have replaced the battery with another one from another vehicle we have. It starts up that vehicle ok so I'm sure the battery itself is ok. But I will for sure check the terminals and the wiring by the air filter first thing in the morning. I will be sending u some money through as son as I get a net spend card to do that with. Lol. U r awesome and thank u so much for ur quick response. Wow is all I can say.

Glad I could give you help! Don't worry about money til its going! Lol!

The headlights on my 1998 Monte Carlo won't work. I've replaced the bulbs. I'm trying to find the headlight relay but its not located inside the relay boxes under the hood. Where is this? If that doesn't work what other problems can cause this and how do you fix it?

My low beam head lights won't come on. The high beam side works as it should. I can't find a seperate fuse for the low beam headlights. I checked all the fuses and bulbs I could and they are good.

Where is the multifunction switch located?

When turning on my head lights, my dash lights and parking lights will not work but head lights come on. I checked the fuses and change the head light switch what else can it be

Head light and dimmer switch is all one unit