Robert: Most relays used in aftermarket (and some manufacturers) electrical systems are "Bosch" type relays. Also known as cube relays. Most have 5 pins, but some only have 4. The pins are usually numbered 85, 86, 30, 87 and 87a.
Some have additional features. I have a some cube relays with built in automotive fuse holders that are looking for a project.
Call me in the morning (you have my number) to talk relays.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| 
