IF you have the OPTIONAL timer harness (does not come with timers), it is mostly plug-and-play.
Unplug the main ingition harness at the bottom of the steering column (large white plug) then put the optional timer harness in, then plug the timer's supplied harness into the optioninal one. Then you only have to run e-brake safety wire, and a ground.
Without that $19 optional harness, you will have to cut and solder several thick wires - a big pain in the *** believe me! Crimp connectors? Don't get me started on those.....
Nothing is needed over by the ECU at all.
_______________________Jeff Holdenhttp://
www.heavythrottle.com