Does anyone have any pictures of how they ran wires into the 4runner through the firewall from aftermarket lights, stereo systems, etc.?

I ran 2 - 4 gauge wires through it....

On the driverside, under the hood you will find a large stream of wires going into the fire wall through a rubber cap with a hole in it.

This rubber cap has about a 4-6 inch space in middle for the fire wall, this means that once you put the wire through the hole (it will strecth) on the engine bay side, you will then have to go inside cab and pull the wire through the second part of the rubber cap (because it's stuck in the middle)


I found that pulling it through was the hardest part and you must have a pretty stiff wire to do this. I'm sure you can do it with smaller gauge wire but i think it would be harder.


Wiring the wires this way will not damage anything on your vehicle (once again stretch the hole, do NOT cut it it will fit 2 or 3 - 2 or maybe even 0 gauge wires through there!) and on top of it it still keeps your cab water tight like it was meant to be :-)


Oh and if you still want pics let me know!
Good luck

On mine I just cut a little slit in the grommet on the drivers side and stuck the wire thru. Its super snug so I never worried about water...and its never been a problem for the last 3 years.

I would suggest using a wire coat hanger wire, I used this with some vaseline as lube for it to glide through. Get the wire through and use it to then fish a string through, and then tie your wires to the string to pull them through. (i lubed the string and wire, it made life easier.) good luck!

i second the pull tape method.

I ran 1G cable throught the grommet on the passenger side as that is where my 2nd battery is installed. It took some finessing but it works.

You may not see this, (now 2022) but thanks for the pic.

Recently bought an 03, v6 for daughter. So. Cal. so it is very good shape.
Used your pic to help install a kill switch.