the factory switch has alot of wires, when you say it's "dead" I'm not sure how easy it would be to reproduce that if something is not working propery. There may be relays somewhere else that are not working properly? If something in there isn't working properly, the simpler 'bypass' mods may not work? I'm not sure. The mod (or at least the one I did) I believe still keeps some of the safety features, like you can't lock them at higher speeds, and they automatically unlock at higher speeds (40mph or something?) I don't know for sure that these safety things are still in place with the way I did it, I've never tried locking them at higher speeds. So if the relays (or whatever) help control those safety features, the bypass may not work if something is malfunctioning on yours.
However, if you are considering doing the bypass mod, I would just do it! It's very easy (even for someone like me who doesn't know mucha bout wiring) and was very quick, and quite nice to have! I believe it's pin 6 and 7 go to one of each switch, and then ground each switch (you can do that to pin 1) that's what I did.
If you are thinking of going straight to the pumps with the wires, it might be a problem if the pumps themselves don't automatically shut off? If the pumps do automatically shut off on their own (with no external controller or something!?), then I would think it should probably be pretty easy to just wire up switches straight to the pumps. I don't know which is the case.