I want to buy these:

but i have little electrical knowledge. I need to know how I would connect them electrically. Do I need to connect to the wiring harness or bring power from the battery and how?

 

You could always run power from the battery and put a switch in the cab and use the holes in the floor at the back of the cab. Seal it and bam. Done. Thats how i would do it anyway.

 

But can i connect to wiring harness

 

Not that i know off. It says that it works for all makes and models. So im pretty sure its going to wanna draw power from the battery

 

Like said you would be better off running a fused wiring harness off the battery or solenoid, an adding a toggle switch. I agree with either running out the back of the cab, or under the truck. You could run the wires through the fire wall for the toggle switch an mount the switch on the trim some where.

 

Have you had success with the B-Lights? Mine had half the LED's burn out within two months. I am awaiting a warranty replacement.

 

never did it. want to, but have no funds