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Unread 04-21-2015, 01:39 AM   #1
djfred
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4 Lights one relay, one switch

Hey guys i have a question about wiring a single switch that is SPDT (on-off-on)
to a replay that will support 4 lights and the way it will work is as such.

ON-2 lights front
Off
ON-2 lights left

I know i can get this to work if i put another relay and call it a day but i want to be able to use single relay and less wires. The relay is also SPDT (i have 87/87a). Every scenario i run in my head it doesn't work, but i might be wrong. Hopefully someone smarter then I can say other wise.

Thank you

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Unread 04-21-2015, 04:37 AM   #2
14Sport
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Since the resting state of the relay makes a connection through pin 87a, anything hooked to that pin would be lit all the time with the key off, if you were thinking of wiring a pair of lights to both pins 87 and 87a. Therefore, a SPST relay could be used instead. Now I believe you could use the on/off/on switch to direct the load circuit to the lights. But to do that you will need another switch to activate the control circuit.

Now if you're going to use the 3 way switch on the load circuit, you could just eliminate the relay (and therefore, the control circuit switch) altogether and just go with a 3 way switch.

Of course, everything would need to be properly rated.

I personally would just use 2 relays unless the 4 lights are very low draw LEDs.
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Unread 04-21-2015, 05:06 AM   #3
CJ7-Tim
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Relays good, fire bad, use relays and fuses.
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Unread 04-21-2015, 06:05 AM   #4
14Sport
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Something like this...
3-way-switch-2-sets-lights.jpg  
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Unread 04-21-2015, 08:27 AM   #5
JordanAssemb
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Quote:
Originally Posted by 14Sport View Post
Something like this...
Exactly how I've run my lights in the past (as they were 100W each) and how I recommend people run their wiring with the boxes I set up for them.

OP if your lights are low draw you may be able to use a single 30A or 40A relay, but as 14Sport said, anything other than LEDs and you probably ought to run two relays
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Unread 04-21-2015, 10:22 AM   #6
djfred
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Hey guys thank you for getting back so quick.
i actually do have a inline fuses for everything that pulls power from a switch. (I have uploaded pics of the setup i have.)

14Sport, you have exactly what i want to do. I had that schematic in mind but i like i said before i wanted to avoid
putting in another relay. But if itll make things easier then so be it.
img_20150421_085924.jpg   img_20150421_085951.jpg  
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Unread 04-21-2015, 10:42 AM   #7
14Sport
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I see room for another socket.
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Unread 04-21-2015, 10:52 AM   #8
djfred
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Yup i will be putting in two relay's inside that box.

Switch 1
ON-Front
OFF
ON-Left

Switch 2
ON-Rear
OFF
ON-Right
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White 92 YJ -- RE 1.5" SOA -- BFG KM2 35x12.50x15 -- D30 (4.88 w/ ARB) -- Ford 8.8 (4.88 w/ ARB)
Sanden OBA (Click for How-To)

--Future Mod--
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Unread 04-21-2015, 11:01 AM   #9
14Sport
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Quote:
Originally Posted by djfred View Post
Yup i will be putting in two relay's inside that box.

Switch 1
ON-Front
OFF
ON-Left

Switch 2
ON-Rear
OFF
ON-Right
It's coming along nicely.
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Unread 04-21-2015, 11:04 AM   #10
djfred
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Yes i am liking this method then my old one (pic below)
The wires where all over, with this its a bit more contained.

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--Now--
White 92 YJ -- RE 1.5" SOA -- BFG KM2 35x12.50x15 -- D30 (4.88 w/ ARB) -- Ford 8.8 (4.88 w/ ARB)
Sanden OBA (Click for How-To)

--Future Mod--
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Unread 04-21-2015, 11:21 AM   #11
JordanAssemb
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Personally, I love the Bussmann boxes because of the waterproofing. I originally got one when I built a YJ plow rig, and now have made one for my WJ's (future) lighting.
1705354d1416027003-what-did-you-do-your-wj-today-az32arl.jpg   1705346d1416027003-what-did-you-do-your-wj-today-l8f3apx.jpg  
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Unread 04-21-2015, 11:40 AM   #12
djfred
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oh wow that's awesome. that would have to be my next project when i run out of space in my container.
Thanks for showing me that i didn't know they made that. I have been looking for a PDM like that for a while now.
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--Now--
White 92 YJ -- RE 1.5" SOA -- BFG KM2 35x12.50x15 -- D30 (4.88 w/ ARB) -- Ford 8.8 (4.88 w/ ARB)
Sanden OBA (Click for How-To)

--Future Mod--
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Unread 04-21-2015, 12:14 PM   #13
JordanAssemb
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Quote:
Originally Posted by djfred View Post
oh wow that's awesome. that would have to be my next project when i run out of space in my container.
Thanks for showing me that i didn't know they made that. I have been looking for a PDM like that for a while now.
No problem, I enjoy these things enough that I started trying to sell them locally, but it takes awhile to build them. Looks like you'd need two of the 15303 series, or possibly the bigger 15400 series: http://www.cooperindustries.com/cont...laymodule.html

I've always wanted to put one of those together, but could never really justify it.
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Unread 04-21-2015, 12:18 PM   #14
14Sport
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Quote:
Originally Posted by djfred View Post
Yes i am liking this method then my old one (pic below)
The wires where all over, with this its a bit more contained.

Quote:
Originally Posted by JordanAssemb View Post
Personally, I love the Bussmann boxes because of the waterproofing. I originally got one when I built a YJ plow rig, and now have made one for my WJ's (future) lighting.
Nice work, guys. I love seeing people build their own. It's a great learning process as well.
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2014JK,auto,MC GCL 2.5",35x12.5x17, 3.73s.

My observations are based on my experiences...YMMV.
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Unread 04-21-2015, 12:54 PM   #15
JordanAssemb
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2001 WJ 
 
Join Date: Sep 2014
Posts: 168
Quote:
Originally Posted by 14Sport View Post
Nice work, guys. I love seeing people build their own. It's a great learning process as well.
It really is, when I first started trying to wire, I didn't even know what a relay did. And I was able to wire up the YJ without burning it down, so I considered that a success
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