So i have 5 ground wires, all on this one little screw in the glove box. All the wires are for lights. 4 offroad lights and 2 foglights. But I took my fog lights out so just the 4 offroad lights. Do those wires get super hot or what is the deal?

 

nope, they won't get hot, but you may loose some ground strength.
but in all reality, if the screw is long enough, it will be fine.

but if possible, you really should find one or two more good ground screws to dissipate things.

 

1. Yes, heat will be generated. The purpose of a ground wire is to "ground" the electrical current. This means resistance, which generates heat. Just how much heat depends on how much power you're running. Putting that in your glove box just doesn't seem like a good idea IMO.
2. Why are you running 4 separate grounds? Why not tie all your offroad lights into one wire/ground/switch if they're all facing forward? Even if you've got one or two facing towards the rear you could just do two main wires leading to switches and then branching them off to the separate lights. Much cleaner and way simpler to fix should something happen.

I've got all four of my top lights wired together, going down inside the passenger b column, under the door sill trim (where my ground is), up into the glove box, across the inside of the dash, and into the switch. My front 2 are grounded in the engine bay and run through the main harness firewall grommet. Both sets are powered directly from the battery and have 30amp safety fuses on them. 6 lights, 2 switches, and an extremely clean look. It works great and I've never had a problem. When it comes to electrical, simpler is better.

 

You're right, they won't get hot, but heat will be generated. Not enough for a fire, but heat will be generated. Sorry for any confusion.

 

Thanks for the tips. btw maroon xj's FTW!!!