That's cool. Thanks.

You don't need to replace the harness unless you really are concerned about other issues; you can replace the thermo wire. Just match it up with bulk thermo wire at the auto parts store and splice it in with soldered splices and shrink tube. Harnesses are not cheap for the plug and play versions, and though old wire will have some degradation due to oxidation, it should still be serviceable if you replace any damaged wire.