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Unread 02-11-2007, 02:06 PM   #1
Jmila1901
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Found a neat fog light wiring diagram... But whats this?

Fog Light Wiring Diagram


My question is on the on/off toggle switch do you really need that off cable going to the fuse box? thats the part i dont get

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Originally Posted by KeepRockin024
You know your drunk when you have a little to much blood in your alcohol stream
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Unread 02-11-2007, 02:08 PM   #2
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Click free
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Originally Posted by KeepRockin024
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Unread 02-11-2007, 02:13 PM   #3
UltimatE
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I love that diagram, its the one I use most often. The point of the wire going to the fuse box is the 12v+ switched wire, such that it is impossible to leave your lights on with the ignition off.

Edit: That's not an "off wire" That switch is a SPST (Single pole, single throw) Its the 12v source to trip the relay when the switch is turned on.
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Unread 02-11-2007, 02:16 PM   #4
Jmila1901
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Do you need it??? My electrical skills are horrible lol...
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Quote:
Originally Posted by KeepRockin024
You know your drunk when you have a little to much blood in your alcohol stream
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Unread 02-11-2007, 03:09 PM   #5
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its what gives power to the switch.

look at this sorta flow chart and see if you understand.

12 volt source like fusebox or battery -> feeds 12 volts into the switch -> the switch is turned on feeding that 12 volts of power to the number 85 pin on the relay turning the relay on -> pulling the big *** load of power from the battery in pin 30 -> feeding that battery power to the lights -> poof. you have daylight at night.

the only thing i dont like about that diagram is that it uses an older style non lighted switch with seperate pilot light
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Last edited by madrabbitt; 02-11-2007 at 04:06 PM..
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Unread 02-11-2007, 03:10 PM   #6
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The line going to the fuse box is needed.
It it the "hot" side of the switch.
I agree with ULTIMATE157.
The circuit uses a relay to give power to the lights so it doesn't have to go through the on/off switch and overload it. With the relay you can uses a smaller switch.
It is very much like the circuit for a starter.
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Unread 02-11-2007, 03:16 PM   #7
Jmila1901
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Does anyone have any pictures of the wiring on their car?? i would really appreciate it if you would take a few pointing out where it runs through. Instead of lighting up the road with fog lights i might end up lighting the road with my flaming car lol....
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Quote:
Originally Posted by KeepRockin024
You know your drunk when you have a little to much blood in your alcohol stream
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Unread 02-11-2007, 06:47 PM   #8
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http://viewsfrommylens.com/Jeep/tech_index.html
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Unread 02-11-2007, 06:53 PM   #9
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isnt the wire going to the fusebox so that you can leave the switch in the on position and not have to worry about turning the switch off when you turn off the engine. kinda like daytime running lights in the sense that when you turn the truck on the lights come on? unless of course you flip the switch off?

P.S. im electrically retarded
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Unread 02-11-2007, 06:59 PM   #10
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Quote:
Originally Posted by XJHERO
isnt the wire going to the fusebox so that you can leave the switch in the on position and not have to worry about turning the switch off when you turn off the engine. kinda like daytime running lights in the sense that when you turn the truck on the lights come on? unless of course you flip the switch off?
Thats exactly why that particular wire is run from/to the fuse box. You have the 12v+ wire for the switch on an ignition circuit so that you don't have to turn off the switch when you turn off the ignition. If you want to have the lights off while driving, just throw the switch off.
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Unread 02-11-2007, 07:06 PM   #11
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That diagram does not reflect the 87 and 87a pins being hot. You should run a wire to each light from the relay, one from the 87 pin and one from the 87a pin.
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Unread 02-11-2007, 07:32 PM   #12
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Quote:
Originally Posted by Rescue XJ
That diagram does not reflect the 87 and 87a pins being hot. You should run a wire to each light from the relay, one from the 87 pin and one from the 87a pin.
87a is normally closed. If you connected one light to that, it would go on when the fog light switch was off, and be off when the switch was on. There are some relays that have 2 pin 87's. In that case you would run one light to each pin.
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Unread 02-11-2007, 08:04 PM   #13
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Quote:
Originally Posted by TheInstaller
87a is normally closed. If you connected one light to that, it would go on when the fog light switch was off, and be off when the switch was on. There are some relays that have 2 pin 87's. In that case you would run one light to each pin.
What he said. A relay with 87A is a double pole single throw (DPST) relay.
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Unread 02-11-2007, 08:37 PM   #14
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yeah. drew musta had a case of the drive by dumbs.

87a is a normally closed contact. you use one or the other depending on your requirement (do you need the circut ON or OFF when the relay is energized)

Other relays have two pin 87's or the second says 87x.

The diagram is right.
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Unread 09-30-2009, 03:03 AM   #15
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you should just get a llighted switch. that way, if you leave the lights on, there is a red light mounted somewhere you can see it. it's sooooo much easier, and it looks cool.
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