Any one know how?

 

You should already have a bundle of wires feeding through the firewall. Just go through there.

 

Based on experience you have to be very careful when you poke a wire through. Usually there is some room to use a coat hanger to poke through the rubber grommet. But when you poke through a group of wires (wire harness) you risk the chance of affecting a major electrical item that could void the warranty and cost you money.

 

OK, so be careful while doing it. It easier than drilling a new hole and putting in a grommet. Not that drilling a hole is hard but if you just running a wire or two the easiest way is just to go for whats already there.

 

Yeah I checked it out and it looked easy to run a wire through

 

The large rubber grommet was perfect. Plenty of "Safe" room for a wire

 

Which grommet did you go through? I was trying to get some wires through the firewall this weekend, and the only grommet I could actually reach is the second one down on the drivers side. All that interior mat-stuff thats behind the pedals are a real pain in the arse, but I could not get a smoothed coat-hanger through that grommet from the inside, and can't reach any of the grommets from the engine compartment. never seen a firewall so "closed" up.

 

This bigger queston is: why do you want to run a wire through the firewall? If you need power, you can get it right off the center console fusebox. Just pull the panel off the passenger side and grab a circuit there:



Of course, if you're looking to add an underhood accessory controlled from within the cabin, I understand.

Hope it helps,

 

Mitz wants a musical horn, so the horn-part needs to go in the engine-bay, and it's got 2 wires to connect to the control module. Power and ground I'd do in the fuse-box. Couple things tapped in there already :-)

 

get a loooong flat nose screwdriver ( i used one thats about a foot long) and punch a hole through the firewall. After you're successful with that straighten out a coat hanger, make a small hook in one end, wrap the wires you want to run through the hook once and tape it up. You can then run the coat hanger through the hole with the wires and get everything across with ease.