I've done some electrical work in the past. Mostly just to jury rig some brake and back up lighting on my '58 Olds. I never spliced into a wiring harness, or had to worry about amperage.
I did recently visit my local Harbor Freight, and got some fabric tape, shrink tubing, wire cutters and a crimp tool. The feeble electrical tools I had were sub-par. I even got a battery operated heat gun to shrink the tubing once I get the wires joined. I'm not afraid of spending money; I'm just afraid of having to spend more money to fix what I butcher. LOL
I can understand your anxiety about doing this project but I guarantee you will laugh at yourself after it's finished for worrying about it. It's unbelievably easy. The auxiliary switches make it so simple because you pick which switch you want your lights to go to and connect it. The part that took me the longest time was routing the wire so it looked factory and wasn't hanging all over.
I went with the Baja bumper lights that had a harness already set up for the auxiliary switches so they were super easy since both sides were already joined together but my Rigid ditch lights did not have a harness. That took me a little more time since I had to find a good way to join the left and right side to a single wire that goes to the power wire. If you have the right connector for that, you're golden. (I hope that kinda made sense.)
2022 Bronco Badlands, 4D, Hot Pepper Red, 2.7, Squatch, Lux, and MIC.
7/13/2020 10:04pm reservation. Blend 6/16/2022 Delivered 6/26/2022.
Dealership - Stephen's Auto Center.