Scofco

Like I said, I'm a newb. This is my first time working with a relay.

Why is it that:



This is obvious why it works, but it means nothing is fried:



I'm sure someone will call me an idiot for this.

4RUNR

Here is a diagram I drew in 1998. Should answer your question.

Scofco

Does that mean I have to ground 85?

flecker

Uhm, that relays missing a ground.

4RUNR

From your diagram, you should apply constant 12v to 85.

Scofco

We have a winner!
Thanks bud.
Now I need to head down tommorrow and pick up a fuse holder and more wire.
I managed to get one of the lights wired, but I don't have enough wire left to connect the 2nd light to the first. :slap:

914runner

Just out of curiosity, what kind of lights are you wiring up?

Maddog

Your An Idiot......well someone had to say it, Lol
& my 2 Yr old can draw better than that,Havent you heard of a straight edge...

Just kidding ya

Corey

iTrader: (1)

Some relays are different as seen here in my write-up.
https://www.yotatech.com/~corey/tech..._lamp_scan.jpg

85 on the Hella relay which is a Bosch 30 amp unit uses 85 for one of the switch wires.

One of my Hella relays did burn out and I replaced with with another brand, and it wired up totally different.
https://www.yotatech.com/forums/f2/multimeter-info-needed-9117/

shovelhead

If you a 5 pin relay 87 is normally open and 87a is normally closed

ldivinag

what the imporant thing that people are missing is the concept of a relay or the guts inside it and how it works...

in 4RUNR's anim gif, the rectangular thing between poles 85 and 86 is a magnetic coil. remember , if you apply electricity to the coil, it becomes magnetic. now, that thing that 'swings" open between 30 and 87 is just that... a "gate" that is attracted to the end of the coil that is now magnetize. when the coil loses electricity, then the "gate" is released and swing back to the "A" pole of 87.

now, this is a great thing since not only can we use a relay to power a secondary circuit (the primary circuit is the one that switches 85 and 86), like a nice set of powerful lights, you can do wonders.

for example, if your car alarm has a negative trigger pulse. but you accesory requires a positive trigger pulse, then you wire 85 to the alarm output (which is neg) and the 86 to a positive lead.

to the coil, it doesnt matter which pole gets what, as long as one end is positive and the other is negative... if you have a eletricicity going to the coil, that'll work.

okay, back to the neg trigger.

so when the alarm sends a neg trigger pulse to 85 and since 86 has a constant pos going to it, as soon at the trigger happens, then the coil is magnetized and the gate swings to connect 30 and 87.

so you connect 87 to the pos pulse trigger and 30 is connect to the same pos constant source as 86.

again, when the coil is magnetize, the gate swings to connect 30 to 87. and the pos trigger happens. as soon as the neg trigger pulse is finished going to 85, the coil looses the eletricity and the coil becomes demagnetized and the gate swings back to 87a and the pos trigger to 87 is off...

so that's how you switch a neg trigger pulse to a positive trigger...

and you can do wonders with relays...

Flamedx4

[and you can do wonders with relays...]

Indeed. Given enough relays and wire, you can build a computer. All a computer really is is a bunch of relays, either open or closed. Pretty amazing huh?