Hate to bring up a dead tread.


Dose the wire connector from the fog light switch from the stock Have to be plugged back in behind the steering wheel?



I am planning to run all new wires and use the stock switch (on a relay) to run the fogs by themselves. I want to bypass The pricey OEM relay. I was going to unplugged the stock fog light switch wires and use 3M piggy back connectors to hook up the new wires. I have a 2015. that's why I am asking the question.

No you don't have to plug it back in- should work just fine.

I bought one of these.

H11 880 Relay Wiring Harness Conversion Kit for Fog Light LED Bulb AD39 | eBay

I will piggy back into those stock wires from the fog light switch and hook up the wires from the that harness..

its done,

Pain the ass kinda.. I used a new wiring that I bought off ebay.

Ran power off the batter for the lights. For the on/off part of the relay. I jumped off the side marker light (not blinker). I then ran the negative power side wire into the truck and unhook the small fog light switch connector. I disconnected the wires and 3m piggy backed one side for that wire and ran the other side to ground. So you can turn them off/on with the stock switch and when you shut the power off they go out. You do have to run the lights to make the fogs work.



the lights are H8's 35w Yellow lights.

Has anyone seen a 14+ write up for this yet? I can't imagine it being much different, however, I haven't pulled my dash apart yet.

Also curious , want to do this on a 15

Amazing job! Mods & DIY's like this make this forum invaluable! Looking fwd to tackling this

lol- there are like, 700 more in my build thread.

High current, solid state automotive relays are about $10 retail. Although Toyota does charge $250 for an empty 16GB SD card, so I'd imagine the dealer would charge $150 for their rebadge relay. Also, voltage regulation does not occur in a relay.

An ECU is an Engine Control Unit. Used to control valves, injection, air fuel ratios, etc. It won't have anything to do with your lighting. Although I guess ECU can stand for Electronic control unit, which is just a simple microcontroller and houses many relays, logic circuits in a modular plug-and-play unit. Unless you have the interface guide to program this, DIY'ers won't be utilizing this much unless they roll their own.

As an engineer this thread scares me. I bought this wiring harness off ebay and just plugged it in... *shudders*

That's because you guys only see in black and white.


Right @1engineer ?

Then as an engineer you need to realize regular people do stupid shit every day. This falls under the "I can explain it to you but I can't understand it for you" category. Not saying this thread topic is stupid or brilliant either. Just generally speaking. Oh, and engineers do stupid just as well as everyone else....

Yes they do! I try to pretend they don't but I'm reminded quite often that they do.

I've been known to say, "here hold my beer, watch this", blow things up with tannerite, fly and jump out of perfectly good aircraft; although not at the same time!

We see in color too. I have dreams about these quite often:

Ya...Can you believe they taught this?

"Bad Boys Rape Our Young Girls But Violet Gives Willingly"

LOL- How times have changed!

I believe it may have been Ricky Gervais who said: "when you are dead, you don't know you are dead. All of the pain is felt by others. The same thing happens when you are stupid"