OK, after some searching, I've found that for the most part in the 1980's there were two OD relays in the 200 series. My problem is that my relay has been acting up and I'm pretty sure it needs to be replaced. I don't know the part number(it's out in the cold, cold shop!) but it's blue. I have a friend who's fairly familiar with 240's and he told me the relay should be white or orange, not blue. When he gave me some of his spares to try here's what happened: the orange relay made the OD light stay on and wouldn't disengage. The white relays wouldn't work at all. Neither of them have the same part number as my blue relay.

Anybody else ever run into this? Anybody have a good blue relay they'd sell?