I bought a "TE MCP 2.8 Fuse & Relay Block Connector Kit with Cap, 2 Fuses, 1 Relay" to connect my voltmeter with a relay. Sounds easy enough. So I looked at the relay with the numbers wrote on the top of the relay and wired it up. Didn't work. So I spent two evenings checking things over. Still didn't work. So today I make a phone call to Ballinger Motorsports, they transfered me to tech, and in about 15 seconds it was figured out. These relays have numbers on the bottom that don't correspond with the numbers on the top of the relay. I didn't know. So I back the fittings out and put them in the correct location, and volia, it worked. So maybe everyones smarter than me when it comes to working with relays, but if not, and you buy one these you now know the rest of the story.