You burned up your switch...that's what gives, lol.
Multicomp 40A Automotive 12V Relay | ...A) | Multicomp
This is what you need--just see if the parts store carries a basic single pole single throw 12v relay...a 40amp should be fine for a couple driving lights. Make sure it uses a normally open (NO) switch and not normally closed (NC). Their basic relays should already be like that...so if the guy goes, "Huh?" just take what he gives you. lol
Wire the relay as followed...
1.) Battery + to common terminal (get an inline fuse for this run...usually the driving lights come with one...but if they don't, get one and install it here--not sure what size you'd need 15-20A maybe?).
2.) Switched terminal (which will connect to the common terminal when the relay is powered on) to lights
3.) Lights to ground
4.) Battery + to switch
5.) Other side of switch (NOT THE GROUND if it's lighted) to one side of the coil on the relay (if you get a decent relay, the terminals will be marked with a diagram somewhere--doesn't matter which side of the coil you go to)
6.) Other side of the coil to battery -
7a.) If switch is lighted--ground terminal on the switch to a good ground point on the vehicle (I just ran it under the hood to the same ground point as another ground wire so I didn't have to drill another hole).
7b.) If switch is not lighted, you were done at step 6.
Hope this helps some...it looks a lot more complicated while you're doing it, but it's really simple once you finish it.
Btw, you want your lights to run straight from the battery...otherwise they'll burn stuff up. The catch is...and this is where the relay comes in...you DON'T want all that power going through your switch. Using the relay, all the power goes through the relay (which is just a high current switch) and the only power going through the switch is the small amount of power it takes to energize the coil. Also, I tried buying a relay a while back at Autozone and Advance both and neither one here carried the type of relay needed.
If it doesn't look similar to the link I posted above, don't waste your money...you can buy em online for cheap (with cheaper shipping than the one above) all day long.