|Remove the two 10mm computer hold down bolts. Wiggle and slide the computer up. The space is a little cramped. Take your time and do not scratch the paint on the fender. There is enough slack for you to set the computer aside without disconnecting it.|
|Down below where the computer is mounted, you will find a large grommet where wires enter the interior. The grommet is soft and will pull out of the firewall for easy access. There is a little bit of slack in the interior side of the harness, so you can pull some it into the engine compartment. You may also find a plastic harness retainer on the firewall side that, if released, will give you some more slack to work with.|
|Here is where you can make it easy on yourself. Make a "sewing needle" out of some stiff wire. I used some spare solid core copper electrical wire I had laying around. It is flexible, but still stiff enough to do what I need. Make a loop with your wire to form the eye of the needle. Slide the eye through the grommet, so that the loop is accessible. It helps to put a small amount of lubricant on the needle to aid in sliding it through (I used a thin film of Vaseline).|
Pass several inches of the wire you are running through the eye of the needle.
|Pull back on the other end of the needle to easily pull the wire through the grommet. It will make short work out of fishing the wire through the grommet.|
Merely pull whatever length of wire you need through the grommet to reach both sides of your connections. I find it easier to push the wire from the engine compartment side into the interior because the hole is hard to get to from the inside. You can make a "hook" to reach up and grab the wire from the interior side, once you have some wire pushed in.
Finish off your wiring with some corrugated tubing or route your wire through the existing tubing for an invisible effect. Place the grommet back into the firewall making sure that you seat the grommet groove for a good seal. Mount your computer back in it's place and you're done.