Probably the dirtiest task of this whole project is next- cleaning the wire harnesses. The pf harnesses are covered with 30+ years of carbon dust and dirt. I know that some people just swap it all over and keep on trucking, but I personally would not recommend it. You have a shiny new pf, why plop a filthy wire harness on it? I can understand if you just do a basic scrub in the bathtub or hose it off in the driveway and call it good, but I highly recommend doing that at the very least. As anyone who has done work on an older machine knows, once you get carbon dust on your hands, it transfers to anything and everything you touch and it’s a real pain in the ass to clean.
Everyone has different methods to clean the wire harnesses. For this restoration I did a two stage cleaning. Prior to cleaning, I cut many of the old zip ties and then loosely attach some new zip ties just to keep things together. I think this is important so that you get to all the dirt and crap that worked it’s way inside the bundles of wire. I left all of the micro switches attached since they were being replaced. If I wasn’t replacing them, I would remove them. After this, the whole thing goes into the sink for the first scrub down. This is to just clear the initial gunk from it. I use purple power and a scrub brush, then rinse. I then filled the sink with water and scrubbed some more. The water is pretty gross when finished. I hung the harnesses up for a few days to dry.
The harnesses are fairly clean at this point, but I wanted to go one step further. I liked Vid’s dishwasher method to get the harness super clean. The only issue I had with this was using the house dishwasher. I know it’s probably fine, but I had access to another generally unused dishwasher so I used that. Just make sure to use the top shelf so nothing gets damaged by the heating element. The harnesses come out super clean! When you’re done, be sure to look in the drain for any small parts that might have come off. I hung the harnesses up again for a few days to let them dry out.
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