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Offroad/ Fog lights

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Old 12-02-2013, 05:54 PM
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Default Offroad/ Fog lights

Ok, so last week, I bought some wiring and mounted some lights that I took off from my old Ford. They're two Baja 100W lights, that came with a 30A relay, hooked them up under the bumper:
put the 2 + wires together, went to the relay(Pin 30)
both of the -/ grounds to a good ground beside my washer fluid reservoir
1 Wire going from the relay with an inline fuse(15A) to the battery from relay(Pin 87)
Then 1 wire from the relay to the switch(which is also grounded(Pin 85)
Then Pin 86 to a clean ground.

So, after that, I went and picked up a 40A relay and wired it as such: (Always hot)
Pin 87&86 to the battery with same 15A inline fuse
Pin 30 to lights
Pin 85 to switch.

Since this didnt work, I tested the voltage, getting 12V from battery, to the relay, but nothing at the switch or wires going to/ from anywhere. A bit new to wiring, as my old Ford came with everything hooked up and working, so from all of this, am I missing something

All of this is using 14 gauge wires, with some splice connectors.
 
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Old 12-02-2013, 06:02 PM
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Pins 85 and 86 are your control circuits. Put power to one, the other to ground to turn 'on' the relay. (put a switch on either side of it to actually control the relay.)

Pin 30 is power feed from the battery for the load the relay controls. I *think* pin 87a is powered when the relay control circuit is NOT energized, and pin 87 will have power when it is. Test this theory before finalizing your wiring.
 
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Old 12-02-2013, 09:39 PM
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google this "relay diagram for fog lights"
see here


 
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Old 12-02-2013, 10:25 PM
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Originally Posted by dhvaughan View Post
google this "relay diagram for fog lights"
see here


This is the initial diagram I was following, but it didn't work for me.

I have pin 85 to the switch, then on the other terminal of the switch is grounded. I figured it needed to be grounded out, but it doesn't? This is almost giving me a headache lol.
 
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Old 12-02-2013, 10:54 PM
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the diagram above is correct.

don't ground the switch unless it has a ground terminal. a single pole switch should simply turn on/off the 12volt positive power feed.

in the diagram above the extra pigtail from the switch is powering an indicator light which requires a ground. if you don't have an indicator light, remove that entire little pigtail and its ground.

here's a diagram with no indicator light and a non-grounded switch.
Name:  relay-diagram_small2.jpg
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Old 12-02-2013, 11:18 PM
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Originally Posted by dhvaughan View Post
the diagram above is correct.

don't ground the switch unless it has a ground terminal. a single pole switch should simply turn on/off the 12volt positive power feed.

in the diagram above the extra pigtail from the switch is powering an indicator light which requires a ground. if you don't have an indicator light, remove that entire little pigtail and its ground.

here's a diagram with no indicator light and a non-grounded switch.
Ok, that makes a lot more sense than what I was thinking it should've been earlier. I will take the ground off the switch and hook it up to a power source and report back.

Thank you for being very helpful
 
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