Cable from engine bay to cab

[b514]

Hi guys.

I'm looking at installing an air horn on my 2004 and was wondering if any of you can recommend the easiest way to route the valve cable from the engine bay to the dashboard?
I wouldn't want to drill any holes in the firewall and also don't want to have to spend hours taking the dashboard apart.

A radio controlled relay would be so much easier, but I haven't found any that work with a single push button (momentary switch). They all have separate on/off buttons.

Thanks!

 

[b514]

Looks like I found a remote afterall: http://www.ebay.com/itm/1CH-Momenta...ps=63&clkid=7768149589533442685#ht_822wt_1309

 

[ELVATO]

There's a big grommet if you look up into there the gas and brake pedals are. It's close to where the steering shaft goes through the firewall. The hole is a good 1-2" in diameter.

The other side comes out by the bottom of the brake booster.

 

[b514]

There's a big grommet if you look up into there the gas and brake pedals are. It's close to where the steering shaft goes through the firewall. The hole is a good 1-2" in diameter.
The other side comes out by the bottom of the brake booster.

Thanks so much, that's great to know if i'll ever need to put another wire through. Do I need to cut into the rubber, or is the opening 1-2'' large as it is?
If it's large enough maybe I can apply my idea of routing a high pressure line through there to power a hidden air horn in the cab, wired to the alarm system.