Don’t be scared about doing this. It is very simple, so long as you have a basic mechanical knowledge. If you can wire an amp, you can do this mod. It took just over two hours, and that was fiddle-farting around because of the heat.
Supplies needed:
- 1 Hole saw, at least 1.5 inches. You can go smaller if you feel like de-pinning the connectors, or lengthening the wires. I however, am lazy.
- 1 Drill, corded or cordless.
- 1 Pack Industrial Velcro.
- Various hand tools.
- Jack and Stands.
I assume you know how to properly jack your car and put a stand under the passenger-side, and remove the passenger front wheel, so this write-up starts there.
Here is what I started with. All wires are unplugged, and you can see my power wire from my battery relocation, as well as the clear-jacketed ground upgrade coming from the block. There is also a wire in a loom for my temperature gauge in all that mess.
Here is where we are going through from the fender side. I DID NOT pull the entire inner fender, I didn’t feel any need to. I also didn’t feel like messing with the two plastic rivets on the back side of the fender.
Here is the aforementioned plastic rivet. You could replace these with some universal plugs from an auto-parts store, but why bother when you don’t need to? Yes I know that the car is filthy right there. It’s a drag car, not a show car, and I haven’t washed it properly in two months. Give me a break.
Make sure that you also disconnect the ABS Sensor wire, it is in that jumble of a harness up top, and you’ll need to put it through the hole. It’s also clamped with a little plastic clamp on the frame rail.
Here is the wire next to the heater lines that you want to pull up for the ABS sensor.
It helps to take out the bolt holding the heater lines in. It’s a T30 Torx bit.
Here’s what you should have down by the headlight after you disconnect everything. Run it through that little hole by the battery and into the fender well. Here’s everything you’ll have up top by the PCM as far as wires. We’ll be stuffing that down into the inner fender in a moment. After we drill a 1.5″ hole.
Here is what I used to drill the hole. Got it at Lowe’s.
Here’s the hole, finished. Only took like 30 seconds of drilling.
Here’s the underhood side. You’ll want to use a file to smooth down the edges. I used the file on my Leatherman Wave. In hindsight, a round file would probably work better. It’s smooth enough now that I’m not worried about it cutting the loom or wires.
Here’s one of the factory grounds that you want to relocate. I used the stud near the turn signal. You will want to cut the electrical tape to get the slack needed to relocate it. I had already re-done my factory ground for the battery, you can just relocate yours to the same spot as this one.
Here’s the wires coming through from the hole by the PCM. You have to turn the connectors sideways to get them to go through. Put the ones with the smaller wires through first, then the larger connector with the big loom connected to it.
Wires coming through near where the battery would be on most cars. I think that it would be easier to remove your battery when you do this mod. Mine was already relocated however, so it was already easy.
Industrial Velcro, to hold the wires in place. Velcro’d up wires. I didn’t wrap them in electrical tape or anything. I don’t hardly drive the car anymore, much less in the rain, and I don’t see how they’d get wet anyway.
Put my power wire and my gauge wire down behind the heater hoses to hide them.
Cleaned up fender.
Write up by DOUBT IT

