Had a pesky mama squirrel make a nest in my f250 engine compartment. I’m trying to figure out if I need the whole harness or if it comes in sections. She chewed up right behind the pass side battery behind the alternator/ac area. I made as many repairs as I could find but my ac blower is hit or miss and could be a vacuum issue as well but I’d like to eliminate the wiring complete first. Without spending $500 for that complete harness if possible.