Wiring a relay

ALL relays are not numbered the same. It depends on the configuration of the relay and the number of terminals. 30/85/86/87 would be a SPST (single pole, single throw) configuration. 30/85/86/87/87a would be a SPDT (single pole, double throw) configuration. There are relays with many terminals on the back side, and each terminal has to have an identifier, depending on what it's particular configuration is designed to control. If you really sit down and READ the link carefully, you can start to understand a lot about how and what relays CAN do. DD

http://www.bcae1.com/relays.htm

 

No apology needed. My truck had already been wired that way,and It was a typical rats nest of wires,so I couldn't really follow what was there.

I researched using the relays,but was having a time integrating into the EZ harness I was using.....found a toggle switch set-up that just plugged into the column connector, and took the easy way out!!!

 

BTW, I had a 36 Chev P/U that had been wired with a German car fuse block.
I melted all the headlight fuse holders on the way back from the NSRA nats....I would switch to a different one when one melted til they were all gone.

I remembered later that German cars use relays for everything and the block couldn't handle the current.

I ripped everything out, and re-wired with a Painless kit and never had any more trouble (I had bought the kit at the Nats for when I got home)

 

Thanks for the info - This is great. I've always figured relays were job specific and more complicated than this.