Sort of specific request, I realize, but can anyone give me instructions on wiring some aux fog-lights up? I currently have an extra switch hidden under the dash but it is wired up to some back up lights under the rear bumper. Oddly enough, they only come on WITH the headlights. (Won't work with parking lights only) Now, I don't care much about the back-up lights anymore since we got rid of our boat. What I want is to put some fog-lights on the brush guard and wire them to the existing switch. I want them to be able to be switched on with ONLY the parking lights on, as well as WITH the headlights.

 

Moved per OP's request.

-RP-

 

This might do the trick



The brown wire for the parking lamps can be found on the main headlamp switch in the truck, so you do not have to get it from the front of the truck.

let us know if this is what you are looking for, or if you have any questions on it.

 

Thanks for your help, SSCULLY

Yes, that gets me started but I'm schematic-illiterate, so please bear with me. One big question, what is the relay in the center? Is it pre-existing or one I'm going to add? Lol, I'm clueless.

That aside,

I take it the switch there on the brown wire in the drawing is where I'd put my old aux light switch? If so, is that indicating I can just splice from the brown wire into the switch, and then out to the relay in the center? When switched on it switches the relay and gives power to the light, right? The switch that was already installed is a SPDT (don't know why), should I replace it with a SPST switch?

From there I run a fused wire from the battery to the relay and then out to the lights and simply ground them to the chassis?

Are all these wire to relay connections going to require soldering? Or, if its a new relay i'm installing altogether, is there a way to install wires into the underside of the power dist. box (which is where I'm assuming this is going) without soldering?

I hate electrical systems haha, I've always considered myself quick to learn but this is one thing I've never been able to pick up.

 

Sorry If I make you want to bang your head off the wall. Next time the Army gives me some free time I'm going to do some self-educating in the electrical field.

 

the best way to learn somethings is to get in there a do it.I aplode you for that.

 

Not sure what the aux reverse lamps had, so why don't we call this all news.

1. The switch in the cab of the truck, remove the wires from it, and tape the ends that are in the truck that go to the headlamps, and to the reverse lamps.
1.1. If it is soldered cut them long enough to work with either soldering or with butt-connectors to crimp on.

2. The wire that goes through the firewall, to the relay under the hood, get enough to run to the pass side headlamp area. You will want to route this through the firewall ( rubber flad for the fresh air intake above the brake pedal on the '01, should be there on your MY ) up the cowl side fo the hood, and down the pass side fender. This is the wire to 85

3. The relay, you can spend the money on a socket or relay kit for aux lamps, or just get the replay and some female spade crimp terminals. These will fit right on the relay terminals directly. I have done this on every motorcycle I have owned, and it has not failed yet

If you want to get a harness, I'm sure you can get a replacement one for a PIAA / Hella lamp kit.

4. None of this has to do with the truck's junction box. Don't know if you want to try to go the route of adding the factory lamps to the truck, that gets mixed results depending on the MY and trim level.

5. The SPDT switch on the brown wire in the diagram is the aux reverse lamp switch you have. You can change it to a SPST if you want, no need, it is not hurting anything to be a SPDT.

6. The fused wire from the battery and to the lamps, you have that correct. I would run a ground wire to the battery or to the fender, and then out to the lamps, don't try grounding them by the lamp. PIAA does this setup ( others too ? ) and it always works well. My friend still has my '95 truck with 2 sets of PIAA lamps, and they have never given him trouble in that department ( bulbs burning out, yes ).

If you want some starter stuff on soldering, another member sent me this :
http://fordfuelinjection.com/?p=7

Hope that is everything, let us know if you need something else to get going with this project.

 

Thanks a lot man,

Last question until I get the lights here and come up with a trillion more:

What do you recommend I connect the hot wire to? The pos. terminal on the battery itself?

BTW: If I didn't mess up reading the tech article a 30amp fuse should be more than sufficient for most aux fog lights correct? (I'm probably going with PIAA 510s)

 

If you are getting the PIAA kit, it will come with everything you need.

The fuse size depends on the size lamps. I think the PIAA 510 kit comes with a 15 A fuse in the harness ( could be a 20 A ).

If you think of the load, 2 x 55W @ 12.6 V. that is 110W /12.6 = I or 8.73 A.

If you follow the 80% rule, this is a 15 A fuse. M

The kit will have everything you need in it with the instructions



For step #7, this is what is attached to the brown wire in the head lamp switch. For that matter, you can also change the reverse lamps too, you won't need that switch.

 

Awesome, I really appreciate all your help man, I was worried no one would want to install someone else lights for them.

 

o.k. i to want to install lights 1999 f150 but the light switch has parking next turn headlights, then you can pull out? so iam i wrong in saying that this could be used to wire up lights as a spst switch? or on/off. but were to hook up and how?????any info will help. as i just found out about a hidden lime green wire for a thrid brake light. ford realy dont make it user freindly!.thanx Dave

 

As long as the switch is really from a 1999 truck, this is what the factor setup would look like



Using the diagram in post #3 above, you would wire it similar to the ford diagram.

From the main headlamp switch connector:
1. White w/ black stripe wire to the terminal #85 on the relay.
2. Yellow wire to terminal #86
3. Check that black wire is to ground.

With this setup and the DIY relay kit show above, your factory fog lamp switch now operates the added relay.

If the switch is from a 2000 to 2003 MY, then the wiring is a bit different.

Do you know for 100% sure that the switch is from a '99 MY truck ?

 

yes truck is all original. so i take it that there is no hidden wire in the harness to make a easy plug in? lol,lo.well thank you i will study this and post how it went. Dave