Kennedy pumps are the one of the best pumps you don't need a life time warranty with them. They only fail if you get really dirty fuel or turn them on without priming them. Even then they don't cost a ton to rebuild $100 IIRC. If you run out of fuel your not going to ruin the pump unless maybe your using ether to start your truck and don't have it primed good.
I think some people kind of put too much into the priming issue. If you rip lines while driving, any pump will continue to pump diesel while the Kennedy wont because the truck will stall. If your in to ripping fuel line, you've got bigger problems than a priming issue on a lift pump.
Also, to the OP, the harness uses an oil pressure sensor that screws into a port on the oil filter housing. Then the module with the switch ends up on the firewall. The sensor won't kick the pump on unless there is oil pressure and the module with the switch lets you run the pump to bleed any air when you replace a filter, instead of pumping the factory primer.
I ran several types of lift pumps from MITUSA to FASS as well as the twin TTS pumps. TTS and Kennedy are very similiar, some say the Kennedy pumps are better sealed and will hold up better in the bad winter areas, I had the TTS pumps and they worked very well, are still working well on the 07 I sold, very very quiet, I ran a fuel pressure gauge to make sure they were working. My main complaint against the Raptor is the noise, the ones I've heard are noisy as hell, not sure about the new ones however.
Thanks for all the great info fellas!!! So far I have heard very little bad about the Kennedy pump setup. I think I will be running their pump when the time comes to add.
Will also had a fuel pressure gauge, hopefully an oil temp gauge, and maybe one other analog gauge. not sure yet.
thanks for all the opinions. I feel educated in my purchase of the kennedy pump now. The harness sounds like a really good idea!