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<blockquote data-quote="Gauntlet" data-source="post: 216699" data-attributes="member: 545529">A few other things.....put some silicone around the edges of the hole you drilled, and around the outside of the grommet; and once you have it in place, put some silicone on your fingers and cover the grommet/metal with it to prevent the grommet from falling off. Once you slide the wire through and have the length correct, you can put some more silicone in between the wire and the grommet for safety and to make sure no water or anything leaks into your car....only do this if you don&#039;t plan to make any adjustments to the wire, since it&#039;s not necessary.As far as the actual drilling process....just drill a hole. It&#039;s pretty simple. The only thing you have to be aware of is that you drill through just the firewall, and that you don&#039;t drill into anything like the master cylinder or something. If you can, it&#039;s simpler to drill from the hood into the cabin, but in most cases it&#039;s much easier to drill from the cabin into the hood. To make sure you are drilling through just the firewall, this is what you do.....get a yardstick. Put it down through the hood (near the firewall) so it touches the ground, and find a bare spot on your firewall that is relatively near where you plan to drill. Measure the distance the spot is from the ground and from the edge of the car. Get inside the cabin, and line up those measurements on your firewall and see where it is. Make any necessary adjustments you need to get the exact spot you want to drill through. Measure everything again and double/triple to check to be absolutely certain you are drilling through just the firewall, and have at it.As far as question 3.....do you mean that your decks RCA preouts are already in use by an amp for your door speakers, and you want to know how to hook up another amp?</blockquote>

[QUOTE="Gauntlet, post: 216699, member: 545529"] A few other things.....put some silicone around the edges of the hole you drilled, and around the outside of the grommet; and once you have it in place, put some silicone on your fingers and cover the grommet/metal with it to prevent the grommet from falling off. Once you slide the wire through and have the length correct, you can put some more silicone in between the wire and the grommet for safety and to make sure no water or anything leaks into your car....only do this if you don't plan to make any adjustments to the wire, since it's not necessary. As far as the actual drilling process....just drill a hole. It's pretty simple. The only thing you have to be aware of is that you drill through just the firewall, and that you don't drill into anything like the master cylinder or something. If you can, it's simpler to drill from the hood into the cabin, but in most cases it's much easier to drill from the cabin into the hood. To make sure you are drilling through just the firewall, this is what you do.....get a yardstick. Put it down through the hood (near the firewall) so it touches the ground, and find a bare spot on your firewall that is relatively near where you plan to drill. Measure the distance the spot is from the ground and from the edge of the car. Get inside the cabin, and line up those measurements on your firewall and see where it is. Make any necessary adjustments you need to get the exact spot you want to drill through. Measure everything again and double/triple to check to be absolutely certain you are drilling through just the firewall, and have at it. As far as question 3.....do you mean that your decks RCA preouts are already in use by an amp for your door speakers, and you want to know how to hook up another amp? [/QUOTE]

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