Originally Posted by 02rangeroffroad
im putting 8 LED's into the cab of my truck,i want them to come on when my lights are on........couldnt i just run the positive to the number 7 fuse in the fuse box(lights fuse) and then ground it or would it have to be a switch of some type?? thanks for ANY HELP U CAN GIVE
You can't use fuse #7 because it is for a trailer brake/turn lamp.
Fuse #33 in the underhood box protects the dash night illumination circuits.
If the LEDs are intended for a 12v system and already have current-limiting resistors, you can wire them directly to 12V power and ground (observing the correct polarity, of course). If they don't have integral resistors, you will need to add them.