General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Relays

  #1  
Old 06-18-2009
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Icon5 Relays

I have my 4 Hellas wired up but not sure how to double relay or even relay them. I feel like such a newbie
 
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Old 06-18-2009
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oh all you need is a diagram. someone here has one they will post or get you a link to im sure.
 
  #3  
Old 06-18-2009
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yea... I tried to figure it out on the hella paper but since I have previously wired two of them I'm trying to keep wire cutting to a min.
 
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Old 06-18-2009
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I'm an eletrical noob too. This is a little different but might help.

https://www.ranger-forums.com/forum2...stock-fog.html
 
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Old 06-18-2009
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I know people on here have 4 hellas up front, I need one of them to speak on how to double relay lol
 
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Old 06-18-2009
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Mark --

I have a diagram drawn up on my computer @ home... I can post it here for you when I get back to the house (trapped at work [and obvioiusly, working hard!] until 6:00pm).
 
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Old 06-18-2009
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(trapped at work [and obvioiusly, working hard!]
Me too LMAO!!
 
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Old 06-18-2009
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you guys hold on a min. ill find one
 
  #9  
Old 06-18-2009
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ok thanks so much, i just dont get how to tap the relays in
 
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Old 06-18-2009
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Using Relays To Wiring Off Road Lights And Accessories

read and ask any questions you might have.
 
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Old 06-18-2009
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the diagram off this page is what i used to do mine. you will match the numbers on the relay to know what wires your using and where they go
 
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Old 06-18-2009
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Here's the diagram I created for another user:

Name:  AuxLightingRelays.jpg
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In this diagram, I'd use 10 ga. wiring for the red wires, and 16 ga. wires for the green. Put a 30A fuse on each of the red supply wires from the battery, and a 2A fuse on the green wire from the switch.
 
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Old 06-18-2009
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Wow Brian thanks so fricken much need that
 
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Old 06-18-2009
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I dont need a postive to the switch?
 
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Old 06-19-2009
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Yes. the switch isn't shown in that diagram, because the guy I drew it up for was going to be using his stock foglight switch to control them, and he already had a diagram that detailed how to wire a relay to the (negative trigger) factory switch to create a positive trigger.

You could also, just as easily (and more safely, running only a ground wire through the firewall!) hook pin 85 of each relay to a 2A fused power connection, then run the green wire back to your switch, and the other side of the switch to ground.
 
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Old 06-19-2009
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The relays shown in the diagram are SPDT relays...meaning they pull one set of contacts to two positions. There are relays out there called DPDT that pulls a set of contacts with one coil in the relay. I did a quick and dirty diagram of what it would generically look like...basically same thing as what turbo had, but with one relay instead of two.


 
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Old 06-19-2009
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Originally Posted by turbo
Yes. the switch isn't shown in that diagram, because the guy I drew it up for was going to be using his stock foglight switch to control them, and he already had a diagram that detailed how to wire a relay to the (negative trigger) factory switch to create a positive trigger.

You could also, just as easily (and more safely, running only a ground wire through the firewall!) hook pin 85 of each relay to a 2A fused power connection, then run the green wire back to your switch, and the other side of the switch to ground.
Wouldn't you be fine with one relay? The Hella's are only 55 watts so 4 of them only pulls 16-17 amps
 
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Old 06-19-2009
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i have w ired up dozens of lights with relays but cant remember how lol. follow those diagrams they should work for ya.
 
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Old 06-19-2009
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Originally Posted by 04blackedge
Wouldn't you be fine with one relay? The Hella's are only 55 watts so 4 of them only pulls 16-17 amps
Sure... 4x 55W (220W, total) lights would be fine on a single relay.

I drew that diagram for someone that was going to be running 4x 150W (600W, total) lights. You can safely run 350-400W on one (30A) relay, but definitely no more than that.
 
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Old 06-19-2009
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My FF's are 100watts and I plan on up-gradeing the two news ones to 100watts also, I'd rather be safe with two then just one. But thanks for the diagram, I'm going to get back to wireing them. I'll get pics when I'm done
 
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Old 06-19-2009
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Originally Posted by turbo
Sure... 4x 55W (220W, total) lights would be fine on a single relay.

I drew that diagram for someone that was going to be running 4x 150W (600W, total) lights. You can safely run 350-400W on one (30A) relay, but definitely no more than that.
Ah gotcha, didn't know that.
 
  #22  
Old 06-20-2009
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So I can run one (40a) relay with 2x 100w and 2x 55w (310w total)?
 
  #23  
Old 06-21-2009
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yep.

...although, I'd probably put the 2 100s on one relay, and the two 55s on another.. just because.
 
  #24  
Old 06-21-2009
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Thats what I planned to do but wasnt sure if one would work also.
 
  #25  
Old 06-24-2009
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Is it bad if the positive wire to the relay and the 40a relay itself is warm?

I only put one relay in, havent felt the need for two but might change it now...
 
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