Just FYI...Digi-Key sells Potter-Brumfield (now Siemens) automotive relays (SPDT) in a case configuration which is weatherproof and has a mounting bracket. Cost is about $7/ea. Connectors on bottom are push-on. Contact rating is 40 Amp. When I do my headlight conversion, that's what I plan on using. John Mallick '91 200q '84 4000q