hi Justin , you might consider leaving things alone , and spot repair of ends or wires same gauge and color under hood — if needed — if plastic wire and insulation is generally good, then add a fusible link ( sold for fords , use the larger of the two ) or a “ mega fuse” which is a large auto fuse with a molded holder ( e bay) use 50 A size . That will protect against main harness fires . I have used Y n Z twice on 2 Packards , —- But some design confusion on adding turn signals — they offer that . Was not done right , they assume adding a third light at rear to park and stop (So add 4 lights to car) instead of using brake lights ( Right …! ) . I changed it myself and fed back , — at first some bs , later owner turned out to be a good guy sent me ends etc . Said he had let an employee go over mistakes back then . Would do again ,beautiful looking …. Documentation / wiring diagrams could be better . .. and I hear good things about Rhode Island too . It is a bigger job than you think to change a whole harness , dressing wires etc . Figuring out variations , optional items etc etc You DO have to change it all with rubber insulation With plastic , decision is a lot more nuanced . if insulation not dried and cracking I d leave it . But add fuse . Another aspect is our cars have ?4-5 sub harnesses , change what needs it . Doors ? due to flex ? Repair of under hood end not too bad , seldom stuff is bad under the dash—- the hard part . Dashes were built and wired out of the car .. Unless badly messed with Exception is ammeter , be sure nuts UNDER connections are tight to gauge body . Find out typical failures and secure that . On ours , power wires cutting on sharp edges of sheet metal stampings at upper drivers kick panel was the cause of two F disasters I have seen , Problem is in all 300’s? and add in incompetently done repairs especially changing ignition switch , typically over lost key . Locksmith can rekey cylinder it comes out , leave electrics in back alone A Fuse would have saved 3 cars . I think battery disconnects do little , add problems , as fires don’t start with a car sitting in a garage — in general . Fuse does what you want ,,sitting or driving jg Sent from my iPhone On Aug 28, 2023, at 12:10 PM, 'John Lazenby' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:
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