P100DHG Build Thread - Gen 3 Coupe #138

[P100DHG]

Fuse Panel:
In the interest of saving space, ease of access and keeping things clean I placed my fuse panel under the dash in the top left hand corner. I warn you if you are planning to put an AC vent here this is not a good spot, also check to make sure that it doesn't interfere with the placement of your gauges. Think 10 steps ahead. I am not planning on putting any AC vents on my dash. I have a special surprise for those (details on AC vents to come). Locating the fuse panel in this position means you have to make sure all the wires clear the top of the dash, so I made a L bracket that extends the mounting panel down 2 1/4" from the top of the dash cross member. I also bent up one side so it will attach to the firewall. These pictures illustrate it better than I can explain it.

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Anyway the electrical fuse panel is in and I can tell you placing it here will mean extending wires. I can already tell the clutch safety switch and the brake switch wires are in need of extending and likely the whole front harness. My alternator wire will need to be extended and if you route your wires low like I am doing then you'll be doing the same. The alternator wire is in fact 8ga. The harness FFR provides is great but for what I need I did some rearranging, very straight forward and simple. I am soldering all my connections and heat shrinking them as well to insure a perfect, tight, clean connection.

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The picture above probably means nothing to those who don't have this in front of them but might be good to compare if you layout your factory harness to see what positions I moved.

Ignition Control Box & Coil:
No clutter and everything hidden. I don't want to see a single box sticking out so I mounted the ignition control box and the coil behind the firewall. It seems like an inaccessible space but I am making 2 of the transmission tunnel side panels on the passenger and driver side removable. I measured things out and made a metal template. I played around with different spacing and by the time I was done my panel looked like Swiss Cheese so I remade it but well worth the effort. Wires should be short and tidy. I have to be honest putting things this close together is a gamble. I am crossing my fingers I don't have some sort of electrical interference but space is very limited. I'll have to learn by doing I guess...

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As the last few pictures illustrate make sure you make access to remove components if need be. Don't block stuff in. A simple blank rubber grommet can plug your access hole but make a world of difference on serviceability. Just a note I foam backed this panel where it touches the frame tube to dampen vibration and eliminate any noise or rattles.

EFI Control Box:
I placed the EFI control behind the dash. I made studs that it could mount on behind the firewall. Should be a clean look.

I'll put a picture here after I mount it up so check back next week for that.

I sent out a good portion of my panels to the powdercoater. I dropped them at his front door, jumped into my truck and called him from outside. Totally contactless. The new normal unfortunately for now. I plan to pick them up the same way. But once those get back it's off to the races to wire the beast. Last item on the list before ignition and fire is my headers. I am hoping to have those by early summer.

Holes and Placement:
I chose to run my wires through the upper section of the transmission tunnel panel. It will be concealed behind the dash. Take good notes and pictures so you know where things are going, you can always refer back to them. Also as you run wires you might find yourself taking apart a connector like I did for my headlight switch (not in the factory position). Take a dozen pictures from different angles so when you put it back you don't miss a position. Worst case you took too many, you can always delete them.

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