Hello, I'm Jason. I will do my best to answer your question quickly and accurately using the information you have provided.
Sounds like you've got yourself a bit of a project
And yes, I've worked on a few of these
So when you say there's a short....I'm curious how this was determined. Is there no power to pin 1 on that bank of injectors?
Or is there more of a spark issue?
That's fair. So the injector or coil harness? I'm curious what's missing. Fuel or spark on the affected bank.
And so you understand, there might not be a perfect, definitive answer here, but right now I'm just gathering information
I think that would be best. VW has a pretty good selection of wire harness pigtails, although trying to find the correct ones in the ETKA system is a frustrating exercise. The wires don't physically come together though...at least the injector and coil wires. No harm in opening up the harness itself. I'd definitely buy the correct cloth tape so that any repairs still look factory. Also.....
with the correct scan tool, you can verify at least the injector repairs without ever starting the car. The Ross Tech scan tool, VCDS, offers actuations, meaning you can use the scan tool to run each injector so that you can physically hear them open and close.
And if you're good with track-style wiring diagrams, then you should have plenty of information
You should be able to splice. Just make sure you use good quality connectors. The solder-shink ones are preferred. I only use the VW ones when the electrical connector end is needed to fit into a harness connector. But yes, most of the topside of the engine area can be removed for reasonable access.
Sure thing and good luck! It will be tough, but nice if it works out