Best way to route power wire for amp?
02-20-2006, 07:22 PM
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Best way to route power wire for amp? what is the best way to do this? i have heard that behind the pcm is a good spot but i dont wanna do it there. is there any holes in the firewall? how is everyone else doing it? thanks
02-20-2006, 08:52 PM
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the only factory firewall holes i know of are the grommet behind the PCM. that is a cer common spot. that is how mine is done. otherwise, i think u are stuck drillin a hole urself
02-21-2006, 03:03 PM
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I, too used the existing hole in the firewall behind the pcm. From what I have read alot of people use this. It is on the same side as the battery (convienient) and is large enough to pass any guage wire through. (practical)
Just curious why you don't want to use that particular one?
Just curious why you don't want to use that particular one?
02-21-2006, 04:20 PM
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Originally Posted by ded71
I, too used the existing hole in the firewall behind the pcm. From what I have read alot of people use this. It is on the same side as the battery (convienient) and is large enough to pass any guage wire through. (practical)
Just curious why you don't want to use that particular one?
Just curious why you don't want to use that particular one?
02-21-2006, 05:04 PM
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There is/are like one or two small bolts holding the top of the pcm down, Undo the bolt/s and the whole pcm can be maneuvered out of the way.
The hole will come into the car just under the glove box.
The hole will come into the car just under the glove box.
02-21-2006, 08:12 PM
#7
The only other place I can think of other than behind the PCM is the harness on the driver's side (where I ran my 8-gauge amp wire):
"Open the hood and look at the firewall, all the way towards the driver side fender, below the driver's windshield wiper. You will see a large black 2" x 3" wiring harness that passes through the firewall which is secured by a nut along the top edge. You can drill a hole just off the lower left corner of this connector from the inside of the car. Start under the dash by removing the lower rear plastic panel (a couple of screws and a panel popper) that passes between the clutch (if any) and brake pedals.
Locate the large connector and using a razor knife, trim away any of the black plastic covering the area where you will drill. Don't worry about neatness as this will be hidden by the plastic panel you removed earlier. Then use a spring loaded center punch to create a small dent to locate your drill bit. Be sure you punch far enough from the connector to allow the hole saw to clear the connector. Also be sure the hole is big enough to fit the wires or hoses which will pass through. It's best to wear safety glasses while drilling as metal shavings will be flying. Tape a newspaper to the firewall to catch the metal shavings which pass though the hole. Once you get a satisfactory hole, cleanup and replace the plastic panel."
PLEASE BE CAREFUL IF GOING THIS ROUTE!!!! I damaged a few wires while drilling the hole and wound up having the car towed to an electrical shop to repair the damage.
"Open the hood and look at the firewall, all the way towards the driver side fender, below the driver's windshield wiper. You will see a large black 2" x 3" wiring harness that passes through the firewall which is secured by a nut along the top edge. You can drill a hole just off the lower left corner of this connector from the inside of the car. Start under the dash by removing the lower rear plastic panel (a couple of screws and a panel popper) that passes between the clutch (if any) and brake pedals.
Locate the large connector and using a razor knife, trim away any of the black plastic covering the area where you will drill. Don't worry about neatness as this will be hidden by the plastic panel you removed earlier. Then use a spring loaded center punch to create a small dent to locate your drill bit. Be sure you punch far enough from the connector to allow the hole saw to clear the connector. Also be sure the hole is big enough to fit the wires or hoses which will pass through. It's best to wear safety glasses while drilling as metal shavings will be flying. Tape a newspaper to the firewall to catch the metal shavings which pass though the hole. Once you get a satisfactory hole, cleanup and replace the plastic panel."
PLEASE BE CAREFUL IF GOING THIS ROUTE!!!! I damaged a few wires while drilling the hole and wound up having the car towed to an electrical shop to repair the damage.
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02-22-2006, 08:27 AM
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FYI, I didn't remove the PCM, just poked a hole in the grommet from the inside and pushed the wire through until I could reach it in the engine compartment, I was done in under 5 minutes. I don't recommend trying it this way if you aren't flexible as you have to contort yourself somewhat to get it done.
