New England B.S. Thread

Are you asking if you can wire them to come on with headlights, AND/OR a separate switch?

 

You may want to ask HAVOC about this, he seems to have the electric kung fu

 

And separate switch.

I have a switch in the stalk already. I want to add a second switch on my switch panel. Both would activste the fog lights. The switch panel could be used anytime and when the truck was off. Otherwise I only have ditch lights and those aren't aimed anywhere near the front of the truck.

Thanks @HAVOC any input?

 

I was going to suggest the SPDT switches, that’s the simplest way. That switch is specifically designed for 2 inputs, 1 output and I can walk you through the install. You can make it cycle with the low beams on one position and constant on in the other.

if you’re dead set on using the stalk, you may be able to use a 5 pin relay and make it work, I’d have to think about it… but you’d have to splice into the factory wiring harness to make sure nothing gets back fed.

 

@GarlicFarts you can accomplish what you want to do with a 5 pin relay. The main feed would input into 87, output to the dogs would be pin 30. Then power to 87. When the switch is on, it needs to power the relay between 85 and 86, that will cut the relay over to the switch power source.

 

Requirements are sooooo important.
You have fog lights.
Your fog lights operate based on a setting on the stalk.
(I usually leave my stuff set to auto, so I'm actually not all that sure when things come on, so I'm not going to be specific about how it works).
The stalk should continue to control the fog lights in the way it works today.
Whatever stalk setting turns on the fogs should continue to work that way.
If the stalk setting says the fogs should come on they should come on.

IN ADDITION

You want a button, somewhere, that will turn the fogs ON, regardless of whatever the stalk says. If this button is on the fogs are on. No question. If the button is on, the fogs are ON. If the stalk says they are off they will still be ON. If the button is off, but the stalk says they are on they will be ON. If the truck is off, but the button is pushed, the fogs will be ON. You will be perfectly capable of killing your battery with this switch.

I'm just trying to clarify how you want it to work, not questioning how you want it to work.
I have very little opinion on how you use your truck.

This seems like an "and" circuit, where both the stalk and button have to say the fogs should be on. I may be mis-interpreting the requirements, which is why I asked all the things above.

 

Not with a 5 pin relay, can only be one source or the other, not both due to the way the relay is acting in this case.

 

What year truck? I need to look at a wiring diagram to have an idea on what to do.

 

He's a 16

 

I'm not sure if the OEM fog light switch controls a relay or sends a signal to the body computer. If the latter then maybe he can use a 1 amp diode and a switch.

 

YMMV but on my 2010 it hits a relay I believe, @Pugga can confirm as he did my install

 

Hmmm that could work. Would be easier than running a second line too.

Yahtzee.

2020 TRD OR 6A

Close. 20 but still turd gen.




Might be more effort than it's worth. I'll take a look at the relay option though. Otherwise probably just leave it.

 

I feel like your solutions isn't differentiating between 87 and 87A.

I could be mis-understanding, but

The main feed would input into 87
and
Then power to 87

means that (and I'm assuming a lot here, please feel free to correct me) that the battery would go to 87 as would the existing circuit powering the fogs. I'm not sure which of "main feed" vs "power" means battery, but I don't care, they are connected.
This means anything on the "secondary" of (most likely) the relay that powers the fogs would also be driven by the switch (and I have no idea what that might be. it might be nothing).

Using 87 and 87A is actually very clever and something I didn't consider.
If that's not what you're doing then I'm really confused.

 

Lol, saw the 16 and stopped reading


Edit: see all the big brain talk you started

 

https://www.tacomaworld.com/threads/3rd-gen-fog-lights-anytime.615338/

Seems it does go to a relay. I'll poke around and see what I can find. Might be the way to go is piggyback the existing relay somehow.

 

You`d still need to run some new wires in my scheme.

I`m saying intercept the current power wire feeding the fogs. That will be after the factory switch, relay, body control module, all of it. For argument sake, cut intercept it an inch from the light itself.

The input side wire you just cut , call it truck side, connects to 87 on the relay.
The output side, call it the light side, connects to 30 on the relay.
Run a wire either fused from the battery, or something piggy back fused from an ignition protected circuit to 87a. Depends on if you want the abikity for this to operate when the truck is off or not.
Now run your secondary switch, pull power from where ever you want, if you want it to cut power when the truck is off, tap a circuit that is dead when the truck turns off. From the switch, you connect to the 85 side of the relay and ground 86. When the switch is on, it will trigger the relay and the power tomthe fogs will be from the new feed. Kill the switch, the original OEM circuit js restored.

 

If this is what he has (the diagram) then he will just need to add a switched ground as the fog light switch sends a ground to the BCM (body control module) and that in turn sends a signal to the relay.

 

Yeah, down with this. I think the thing that confused me was 87 v 87A.
Clever solution.

It kinda "flips" what I generally consider the inputs of a relay with the outputs, but electrocity don't care.

 

Wire 2 Switches to 1 set of lights? Can It be done?
This seems like a good idea, just gotta find where to pull the stalk wire from.

You know, or this^

 

Happy birthday @mach1man001 !