question. hella's hooked up to stock fog light switch? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-11-2009
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question. hella's hooked up to stock fog light switch?

i have 4 lights on the front of my truck. currently have two wired up. but would like to avoid cutting and stuff to put another switch inside.

now that i have a custom bumper, and no fog lights, can i wire the 55w hella's safely to the stock fog light wiring?
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Old 03-11-2009
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Originally Posted by Tys 4x4 View Post
i have 4 lights on the front of my truck. currently have two wired up. but would like to avoid cutting and stuff to put another switch inside.

now that i have a custom bumper, and no fog lights, can i wire the 55w hella's safely to the stock fog light wiring?
If they are 55w, you will probably be fine.
If you want higher powered lights, do what I did on my ranger. I used one of the fog pigtails to trigger a relay for KC's lights, and run new wire through the relay of course. This way you can switch them on with the factory switch.
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Old 03-11-2009
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im good with the hellas.

so basically cut off the stock fog light plug, and splice in new wires?

is one wire power, and the other ground? and if so, which is which.
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Old 03-11-2009
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i just added a new relay and used the ground signal from the fog light switch to trigger it. figure a 30a relay should cover my 4 100w lights. and keep the load out of the stock wiring.
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Old 03-11-2009
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The stock fog light circuits can handle 55 watts just fine so you should be good. The black wire is ground.
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Old 03-11-2009
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The stock fog light circuits can handle 55 watts just fine so you should be good. The black wire is ground.
sweet! thats exactly what i was lookin for.

thanks!
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Old 03-11-2009
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well it worked great! next up is wiring it so that they stay on with my brights..
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Old 03-11-2009
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i just added a new relay and used the ground signal from the fog light switch to trigger it. figure a 30a relay should cover my 4 100w lights. and keep the load out of the stock wiring.
You should be running a 40 amp imo. 30 amps is questionable at best for 400 watts.
400 watts / 12 volts = 33.3 amps
400 watts / 14 volts = 28.6 amps
Basic math. I would swap in a 40 amp relay if it was my truck.
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Old 03-11-2009
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Originally Posted by brianjwilson View Post
You should be running a 40 amp imo. 30 amps is questionable at best for 400 watts.
400 watts / 12 volts = 33.3 amps
400 watts / 14 volts = 28.6 amps
Basic math. I would swap in a 40 amp relay if it was my truck.
Yea 28a is close, ill keep an eye out for some 40a+ relays while im at the junkyard. it's just 30a is so much more common which is why im running that.
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Old 03-12-2009
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The 40 amps are everywhere dude! lol
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Old 03-12-2009
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yeah they have em at vatozone.

thats where i get 40 A relays everytime i fry one after mudding or something.
they're only like 5 bucks lol
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Old 03-12-2009
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ive never bought a relay so what do i know lol. i always just snag a few when i go to the junkyard.
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Old 03-14-2009
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Originally Posted by rwenzing View Post








Pull the correct relay from the underhood distribution box.
Choose the correct blade and bend it over as shown.
Reinstall.

Works on 2001~2003 Rangers with factory foglamps, possibly others.
Does not work on 2004+ Ranger.
Just to be sure. If I wire my 55w hellas into the factory foglight wiring I'll need to replace this relay with a higher rated one?

I'm planning to run 3 or 4 lights. Can the stock foglight wiring handle 2 hella lights off of one of the foglight wires and the other 2 off the other?
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Old 03-14-2009
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Electrical noob bump
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Old 03-14-2009
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well it worked great! next up is wiring it so that they stay on with my brights..
there's a guy on here that modded the 07 fogs, look for a guy named H.P Freak I think
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Old 03-14-2009
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Just to be sure. If I wire my 55w hellas into the factory foglight wiring I'll need to replace this relay with a higher rated one?

I'm planning to run 3 or 4 lights. Can the stock foglight wiring handle 2 hella lights off of one of the foglight wires and the other 2 off the other?
I'd run two hellas off the stock fog. if you plan on running four, you can run another relay, and just use the ground signal from the foglight switch to feed the new relay. it'll split the load and work the same.
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Old 03-14-2009
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yeah I agree
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Old 03-14-2009
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I could clean up my wiring then haha.

For my lights on the bumper I ran a relay for each light cause I didn't want to fry the stock wiring haha
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Old 03-14-2009
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That should make it easy. Thanks.
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Old 03-14-2009
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Run new wires and a new relay for your foglights if you're going to add more than 2.
The signal wire to turn on the relay should come from the original foglight wiring. The only "power" that would come through the foglight wiring is enough to turn on the relay.
Hook the lights up following the instructions that came with them. But instead of using their switch and wiring, tap into the factory fog light connector. Did that make sense?
I think someone even did a write up for this, it is really simple...
May be more useful info here. http://www.offroadrangers.com/forum/...ad.php?t=20956
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Old 03-14-2009
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Originally Posted by brianjwilson View Post
Run new wires and a new relay for your foglights if you're going to add more than 2.
The signal wire to turn on the relay should come from the original foglight wiring. The only "power" that would come through the foglight wiring is enough to turn on the relay.
Hook the lights up following the instructions that came with them. But instead of using their switch and wiring, tap into the factory fog light connector. Did that make sense?
I think someone even did a write up for this, it is really simple...
May be more useful info here. http://www.offroadrangers.com/forum/...ad.php?t=20956
Awesome thread. Thanks.

If I'm reading it right. I can do it like this? Just take the power from the factory fogs, tan/orange wire, and plug it in at the red circle? Then wire the rest like the directions say and do the foglight mod to get them to work with high beams?



I'm such an electrical noob!! lol

Last edited by seed60; 03-14-2009 at 05:56 PM.
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Old 03-14-2009
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I haven't read through through it to get the correct colored wire, but that is right.

A relay is just a "remotely powered" switch. Most switches are only designed for a few amps, so that is the reason for using a relay. When you power that circuit (turning a switch or putting the foglight power into it), it just closes the circuit and sends the battery powered on to the light.
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Old 03-14-2009
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Awesome! Thanks.
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Old 06-17-2009
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Back from the dead!!

Starting to wire up these lights and had some more questions.

Can I run 3 hellas off one relay, just like the diagram above but with 3 lights? Would that be too much for the foglight power wire, fuse, and relay?

Last edited by seed60; 06-17-2009 at 06:03 PM.
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Old 06-17-2009
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Electrical noob bump
x2

Kinda like this.


Last edited by seed60; 06-17-2009 at 05:35 PM.
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