crash-harris
Breaker! Breaker!
Didn't check continuity specifically, but yes, 0 ohms, leads are red (-) and yellow (+), ISSPRO R658 - K-type - 1600*F. It was a brand new one, but was an ebay purchase, so I'm thinking it may have been mishandled. If it's still acting the same tomorrow then I think I'll order another of the same (for now, a bit cheaper), but from Diesel Manor and see how long that one lasts.