I'm looking at installing a cruise control in my '99 Tacoma since I have a 2 hour drive to and from work. I found a wrecking yard with many rust warranty trucks and the system will cost me $200 for all the stuff I need. I am an electrician and have access to all the wiring diagrams which I've been studying but there is one thing I don't know. Is some or all of the wiring already there for me to plug into or do I have to get all of it from the wrecking yard as well? I'm going to do some exploring under the dash later when I have time however any info on this would be greatly appreciated.

in advance, Tim