Got a wiring mess and need some help.

[oldcarnut]

I bought a 70 Chally couple weeks back and what I thought would be some minor fixes has turned into a mess.  It's an SE formally a 318 that was cloned into a R/T SE 440 auto car.  The guy I bought it from I don't think new anything about cars except to drive'em and let other people work on it.  He added vintage air, an MSD 6a ignition system, high amp stereo, and a powermaster 80amp alt.  Before I bought it I initially saw a few fried wires under the dash, knew the lights didn't work, and other things.  I replaced all of that. I also spent some time fixing the speedo, replacing the headlight switch and other electrical gremlins.  Wires spliced into other wires etc.  and getting rid of the box that made a bunch of animal and siren noises wired into a PA speaker and the horns which also had wires with insulation melted off.  I then started checking the wires under the hood and found 200ft of electrical tape wrapped around more fried wires   .  It's a little confusing because the way things are don't match the FCM schematics in routing and color and of course there are wires spliced with several sections all different sizes to make one length and others cut not connected to anything To add more confusion the bulk head connectors and some wiring are for the Hemi only eng per the FCM and not the other V8's. Anyway I need to redo the whole engine harness and more likely the others too.  Before I make a new one,  I feel there are some runs I don't need to rewire since they probably don't need to be used with the MSD and can leave them out.  I attached a couple of schematics for ref.  I'm wondering if the wires I marked with an "X" can be left off along with the ballest resister, a coil wire, and the tan ign 1.  Take a look and see what you think.  One is the MSD setup, the other are factory.  I'm not a electrical person expert.

[oldcarnut]

just a few of the examples

[oldcarnut]

no problem    tape and splices will fix it

[Bob T]

Ai Yi Yi   
Just climbed that big hill with my car, took me weeks on and off and I'm an electrical contractor by trade, had similar sort of wiring issues and looms missing
Find the best coloured diagrams you can and blow them up if it helps and put them in a folio so you can make notes as you go.
If you're not up for the spend of new looms then buy rolls of the correct guage wire and correct crimps & tools and see if you can get a look  at a buddies car for clues, and get rid of the nasty joins and splices, just problems waiting to happen. the tech section here was a help for me
Old wiring that has been cut into in mulitple places will have a higher resistance 'cause of wicking moisture into it and degrading the copper ( osmosis ) so where you can, replace the offending wires complete from origin to field point

This site was good for diagrams

http://www.mymopar.com/index.php?pid=24


Cheers

[oldcarnut]

Ai Yi Yi is better than what I said when I find it     I got two of the diagrams above from the link you gave.  The guy has been driving this car for long time like this I think so i hope the routings are ok but the marker lights and parking lights are spliced up or just cut off and missing or hanging too.  The electric fuel pump was using solid house wire to run it  .  I'm going to try and buy new wire and fittings and make new ones.  Gotta find a source for the crimps etc.

[Nacho-RT74]

not weird wiring conditions to find locally ( Venezuela )

[oldcarnut]

Any thoughts on eliminating the ballast and coil related wiring with the MSD installed?

[J-440]

 Using an MSD you can eliminate the ballast resistor as well as the voltage regulator.  The orange(+) and black(-) wires from the MSD box goes to the coil.

[Nacho-RT74]

eliminate voltage regulator ?

[J-440]

 My bad.  I have a 140amp, 1 wire alternator with a big ole 50amp fuse that allows me to get rid of the stock voltage reg.  Should have mentioned that.

[Nacho-RT74]

diff story!