I've never done this, and I would recommend purchasing an ohm meter as they are relatively inexpensive. You can go out and buy one for $5 on sale, or if you want you can spend 100 times that amount. A cheap one will do you. Get one with a digital readout though.
It is totally up to you if you want to do the relearn procedure. I am not the guy to ask about that though. It is so simple to check the resistance and just team up a few resistors to get the equivalent value it isn't funny.