Have a 1996 ford mustang GT There's a switch I don't know what is

" dim headlights "? None of your lights should be 'dim'. You have 4 lights.

Side Lights.
Daytime Running Lights (DRL)
Low Beam Headlights.
High Beam Headlights.

Here are the fuses, check fuse 5 and D although they covers more items than lights. Your best bet is to find a good local auto-electrician.

1994-1998 Ford Mustang Fuse Box Diagram

https://knigaproavto.ru > ... > Ford > Mustang

17 Oct 2019 - Fuse Panel Diagram Ford Mustang Mk.4 engine: 3.8L, 4.6L, 4.9L, 5.0L and 5.8L (1994, 1995, 1996, 1997, 1998)

More here

https://www.google.com/search?q=1995+ford+mustang+gt+v8+low+beam+headlight+not+working

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All the grounds are good?How do you know the switch is good?Did you test it with a ohm meter?

The instrument panel fuse panel is located under dash (driver side) early brake.

The high current fuse panel is located in the engine compartment on the left-hand fender apron.

This is for one 1996 Mustang but can help like reference guide: 1996 Ford Mustang - Owners Manual (for FUSES, page 272 and next)

Hope help (remember comment and rated this).

behind your brake paddle there is switch thats makes up when brake is push it gone bad

Check and see if your brake lights are functioning. If they are not then look for fuse #9 to be burned out. The shift interlock on these cars is dependent of brake light circuit and it BOO (brake on/off) switch to release the shift interlock.

I don't know about the part #. But the low pressure switch is on top of the accumulator, maybe the compressor is not cycling due to low refrigerant.If you are low on refrigerant the low pressure sensor will shut off the compressor.

The parking brake must be engaged before the top will work. Hope this helps.

Left hand side (if facing it), behind distributor, above oil fill.

i am not sure about your but i know the expediton and the F-150 once you take the pad off and the rotor there is very small brake pads behind the brake rotor and your may be damage are loose also make sure you hand brakes are not half way up are stuck too

Open the trunk, the reset switch is behind the drivers side tail light, or inside the rear fender area, behind the interior trunk liner. There should be a small place to put your finger through the trunk liner to reset it, without taking anything apart.