if a section of harness was cut in half, what is the best way to fix it without bulky solderless connectors. it has about 9 wires cut

 

iIf you are referring to the wires being cut, you can either use the wire splices that you have mentioned or solder the wires together and put a heatshrink tube over it. If you solder the wires they will be shorter than if you use the wire terminal splices.

 

how does this heat shrink stand up to the charging system wires

 

the reason I want to stay away from the bulky solderless connectors is because this harness was cut where it runs on top of the passenger side valve cover, and I dont want a big bulky mess I want to keep everything in the plastic loom cover

 

you may not have this option since someone hacked it already, but when i spliced and shorntened or elongated some wires, I staggered the cuts so that the butt connectors didn't pile up and caus a big bulge in the wire loom.

 

I don't like soldering the thick wires if thats what you are getting at...larger gauge than most of the wiring harness wires, right? You almost need propane to generate enough heat to get the solder to flow into the wiring when it gets large. Then it ends up a very stiff, typically large, joint.

Shrink tubing will hold up fine, if you generate enough heat in the wire to cause problems with it, something else is wrong. Battery cable this doesn't apply too.

Tp be honest, there is probably a better solution than solder in this case. If nothing else, find the wires in another car such as from a wrecking yard, and replace them from connector to connector in your harness, if that's a possibility. I know it's a hassle, but IMO and experience, it's the only way to make it look "clean" and feel good about the repair.