Got it running, call the fire department Options

[Mcraneiowa]

Good evening all
Picked up a 194 Porsche 914 1.8 about three months ago as a Covid project since I have to work from home for possibly the remainder of the year. Have done lots of work n the car from fixing rust to replacing worn parts,etc. and am now down to the point of trying to figure out the fuel injection system. Couldn’t figure it out. One of the people on this site has been more than helpful in helping me diagnose and help me learn about my car, tremendous thanks to, Clay. His knowledge, insight and directions have been so helpful in guiding me.
So here’s where the fire department comes in, figuratively speaking. I got a new relay double relay hooked it up still couldn’t get the car to run but it has been mentioned if those two plugs were in the wrong slots the car wont run. So I ground down the plugs to fit the new double relay and reversed them. Fuel pump startedrunning even with the key in the off position, but when I turned the key over to start car, instantly fired right up and within a few minutes it was running pretty smoothly. After about five minutes idling in the driveway I heard a pop and about 40 seconds later smoke! The lead (large) wire from the alternator to the starter basically melted the cover of the wire. Looks like it was isolated to only that wire that will need to be replaced.
Now, I’m no electrician in fact I apparently understand just enough about wiring too get into trouble, as just mentioned.

Anybody have ideas of what’s going on at this point? I’m likely in over my head and will probably have to send it off to somebody that works on automotive wiring. I recently replaced the coil, alternator, double relay, fuel pump, etc.. I’d love to hear what everybody thinks, your thoughts and suggestions and solutions, It’s OK if you think the guy working on the car was an idiot, (that would be me)and I would probably have to agree. But, on a positive note, I will say I am learning things along the way. So I’d like to hear what you guys thinking maybe i can get this straightened out.

On a side note, my wife thinks I’m nuts at this point wanting to do anything more to this car with the level of skill I have. But nothing ventured, nothing learned! Thanks, Mike