Mod motor wiring help.

[snowbnny]

Put a 2003 Mach 1 motor in an 85 gt Ttop car with a 3650 cobra brakes and suspension tubular granatelli crossmember with coil overs. Looking to modify the stock 4.6 harness to work in the car. I'm new to this site has anybody modified the stock harness if so do you have prints schematics or diagrams of what you did. Looking to make it a 4 wire hookup basically batt pos, ground, keyed run, and efan. I've used the rjm harnesses on 5.0 swaps but I'm on more of a budget on this one so I'd like to do the mod myself. Thanks

 

[Bill]

Welcome to the site. Make yourself at home. The wiring diagrams you are looking for are posted here on the site, along with a number of wiring type discussions. Its always nice to have another four eyed fox on the board.

 

[snowbnny]

Thanks I appreciate it a lot. Wheres the best place to look for the diagrams. Posted some pics of my build also. Thanks again.

 

[Bill]

Try here http://www.modularfoxmustangs.com/community/forums/electrical-wiring.24/

 

[FuturaGuy]

I used mostly stock 4.6 wire harnesses forward of the firewall and connected them to the dash wiring ('88 Mustang dash in a '79 Futura). The only modification to the harnesses were for four headlights and I moved the battery to the trunk. Your '85 should have a U-shaped harness that goes down both sides of the engine bay and plugs into the dash harness in the center. Probably the cleanest way to connect to the 4.6 would be use the large connector that plugs into the center of the dash and make a harness that connects the dash to the 4.6 wiring. The link in the previous post will direct you to the wiring forum, and when you open it, the top thread will be my general discussion on wiring a Modular engine. It contains a sketch showing the connectors that mate to the dash on a an SN-95 Mustang and the interconnections between the underhood harnesses. My friendly local salvage yard let me cut the mating connectors to C105, C107, C 213, C216, and C259 from a wrecked Mustang. Make sure you leave the pigtails long enough.

Making a harness is not difficult, just tedious, and my advice having been there and done that is to figure it all out on paper before you start cutting wires. If you don't have it, get yourself a good ohmmeter. And if you need wiring diagrams, send me a PM. I have '96-'98 wiring diagrams in book form and on CD, and 1999-up also on CD.

 

[snowbnny]

Sent a PM. Thanks for the help

 

[snowbnny]

I actually have to change the original underhood harness because its in pretty bad shape. I just bought an 86 GT convertible that somebody has already parted out. Ill be using that whole car harness, fuel tank, and misc stuff, if anybody needs any parts for their four eyed car I may have something you might need. Thanks

 

[Bill]

That's awesome. Post up some pics when you get time. I"ve got an 85 vert and an 86 vert that I buy stuff for.