The radio shack part number is 275-226 and it is called a "30 AMP AUTO RELAY".
I took some pictures, but they were too big to post to the site. I'll have to retake them with reduced resolution. I will do that later (I'm off to my granddaughters birthday party).
Thanks for the info on resistances. I'll check that out. It could be that I'm interpolating incorrectly when reading my dash gauge.
92 300E - 116K miles - Sold
77 Euro 350SL - 67k miles
94 Explorer 147k miles
2009 Hyundai Genesis - 65k miles