5 pole relay wiring

I'm hooking up a 5 pole relay but there was no wiring diagram included with it. It has five leads: black, yellow. blue, red and black. How do I know where they go:
87a = ?
30 = ?
87 = ?
86 = ?
85= ?

Any help would be appreciated.

 

30 To constant bat power
87 normally open goes to component,( fan, fuel pump, etc)
87a normally closed
85 ground trigger
86 12v switch trigger

 

Google is your friend

http://www.google.com/search?q=rela...AOU8YHwDw&sqi=2&ved=0CCoQsAQ&biw=1280&bih=598

 

I understand that but color lead coming out of the relay is 30, 87 etc.?

 

I found a wiring diagram that showed:
30 = blue
85 = black
86 = white
87 = yellow
87a = red

Is this correct?

 

Color is up to you. Just keep it consistent. Make black ground.

 

5 pole? Really is a single pole double throw unit.

 

Sheesh, can't anybody make this simple?....

85 and 86 are the relay coil connections; connect one to ground, the other to your 'signal' wire. This is what operates the load contacts in the relay when you want to switch whatever you're trying to turn on/off. Unless there's an internal diode in the relay, it doesn't matter which is which.

30 is the 'common'; connect your supply power for the load to this.

87A is the NC (normally closed) contact. Connect your load here if you want to turn it off when you send a signal to the coil.

87 is the NO (normally open) contact. Connect your load here if you want to turn it on when you send a signal.

Wire colors can be whatever you decide, but ground is usually black.

 

There are two relays that are 5-pole. One has 87 and 87a linked together, and thus has two switched outputs. SPST, two output terminals.

The other switches between 87 and 87a. 87 is hot when the relay is not energized. When it is energized, 87 goes cold, and 87a is hot. SPDT.

 

5 poles or 5 terminals? Poles and terminals are two different beasts!

 

Exactly.

 

best place to get the relay:

 

Here is the wiring diagram. The relays have 5 wires coming out of them. The problem is I don't know what wire is what. In other words what lead is 30, 85 86 etc. How do I figure that out?

 

I found the lead wire identification on the back of the relay. Thanks for the help guys.

 

If you have a 'generic' Bosch-type relay, the numbers will be molded next to their respective terminals. If what you have just has wires sticking out of the relay enclosure with no identification, you'll have to identify them. You'll need an ohmmeter for this....

Set the meter to the '2K' ohm scale for testing.

One wire won't read continuity to any of the others; that will be your NO contact, number 87.

The other four will be two 'pairs'. Each pair will read continuity to each other but not to any of the other wires. One pair will read zero ohms or close to it between them, that will be the 30 and 87A terminals (more on these in a minute). The other pair will read continuity, but you'll get a higher reading, probably somewhere in the 70-140 ohm range, and these are the relay coil connections (85 and 86). Swap the test leads between wires to check for a diode; if a diode is present, you'll get a reading one way but not the other. If you find that, note which wire the black tester (- lead) lead is connected to when you have continuity, that wire will have to be connected to ground. If you get the same reading both ways, it doesn't matter which goes to ground. I'll note that if your relays have diodes in the coil circuit, that diagram you posted won't work as drawn.

To identify the 30 and 87A terminals, apply 12V power to the 85 and 86 wires. The relay should 'click' (coil pulled in) and you'll no longer have continuity between 30 and 87A. You will have continuity between 87 and one of these wires now, whichever one 'reads' to 87 is 30.

If you're still stumped, PM me for my phone #....

I see you figured this out while I was typing.... never mind.... LOL

 

The first style usually has both terminals marked 87, no 87a.