Tow hitch and wiring harness installation
I installed the Toyota hitch on my 2007 FJ (just for using a hitch-mount bike rack, not towing a trailer) some time back. Toyota dealer said it would be "hard to do", suggested I have them do it (for a lot more money than I was willing to pay), but I did it myself with no problems whatsoever.
Now I need to tow a trailer and want to get the Toyota factory wiring harness/pin connector kit. Dealer wants $120 for the kit, plus another $50 to install it. Once again, he says it's "hard to do" and I shouldn't install it myself.
Other vendors advertise the same kit for about $80-90, so I'd rather buy it from them, save money and do it myself. I can do just about everything mechanical on my own, but I'm a bit apprehensive about electrical systems and connections on modern vehicles.
How hard is it to install/connect this Toyota factory wiring harness?