Painless wire harness install (MORE PROGRESS)

67Dart273 said
Why do you have a separate 8 ga running from the trunk to under the dash?

Bear in mind that the reason the starter relay was originally under the hood was to help keep the starter relay to solenoid wire somewhat short, and normally it should be no12/ no10

and.............The starter relay was originally intended to just be a handy junction point, that is, the battery stud.

I don't like to get too much junk on the starter post. There's a lot of vibration down there (engine movement) and the more cables on it, the more force there is trying to loosen the nut.

I would find a good big insulated junction bolt to mimic the original starter relay stud. I would run ONE cable from the battery to that stud, mounted somewhere on the firewall near the starter.

Run a wire from the stud to the starter

Run a wire from the stud to the alternator

Run a wire from the stud (no8 or so) to the interior junction

What do you have for a battery disconnect, anything? Or are you not planning on any racing.

Here is what i have for parts and my plans, these are all plans and have not been installed yet.

I have a yellow top ultima battery with top and front posts mounted in a box in the trunk. I am running the 1/0 power to the B+ lug on the starter.

I then plan to run two separate 6-8ga.wires from the front mounted posts on the battery to a power and ground junction box (black boxes mounted on the second panel i made) up under the dash of the car. this way i can have direct power and ground for my msd ignition and fuse panel without having to run the power supply wires thru the fire wall and to the starter relay post.

with the junction box on the inside passenger kick panel my wire from the starter relay to the starter will be shorter than if the relay was in the stock location.

doing things this way i will only have 2 wires on the starter post. the power in from the battery to starter and the charge wire coming off the alternator to the starter post.

does the post on the starter relay even do anything besides provide a power junction point? is that where the signal wire gets its power?

I plan to run a power cut off switch in the rear bumper area. this is where i would connect both power wires going to the front of the car. this would kill the power to the fuse block and the ignition system.

I am open to all input. I have never done this so i am all ears. just trying to make this as clean as possible with out setting the car on fire.

I thank you all for letting me bounce my idea's off of you.