Did an 85 Town Car some years back. Takes patience and extreme care not to damage anything. This car burned in the engine area, and so I replaced the harness nose to tail. Use masking tape and mark everything. NOT completely idiot proof and can be mis-assembled. All clips are easy to break too. Go slow. Did a 68 Olds 98, loaded, and same difficulty. This time I needed to replace dash pad and add Comfortron and cruise, both of which just plug in deep inside. Old wiring is very stiff, and often needs new tape. if you don’t mind punishment, these are just tedious jobs, not too complicated. Replaced the touch screen on my wife’s Caddy XTS. Substantial disassembly including the console. Thank heavens there are videos for the newer stuff! Here was a definite sequence, and you have to be extremely careful, or pay big bucks for new parts damaged. 6 hour job, and not one comfortable work position!
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