John and others – While rewiring my 59 Dodge, I noticed a number of areas where the harness would come close to a sharp edge. Since I’m not a fan of car fires, I figured that the harness needed to be in a conduit of sorts that wasn’t going to rub thru. One of my solutions was at the local bike shop, where they were more than happy to give up used bicycle tubes. Cut to size, then slit up the side. Wrap around the harness and duct tape. That should last a while. Ron From: John Grady Hi , that failure of a wire crossing into the inner spaces of our body sheet metal over a sharp punched factory edge has taken out an F harness and a G harness in my personal experience .. the whole harness in that case.. all of it- ! as the heavy feed wire to the breakers located in drivers kick panel is unfused battery power .Large wire 10 or 12 of course it is the one all by itself that matters and shorts out ! Twice in two different cars Harness melts under dash and out to starter relay a fused together mess. This is really a major design fault , in all our cars . And restorers sometimes do not position the few added factory sleeves ( in the case of these F and G ) on the wire correctly so as to protect the vinyl wire covering , at the sharp place , but they slide down the wire . They also crumble , not good stuff . All that aside , when restoring our cars , anyplace you see a wire or bundle passing in or out of a body cavity , put a piece of that convoluted plastic tubing with a slit down the side ( see Waytek web site for good stuff , high temp has blue or grey stripe on it )-/ or ebay for low price and ok when not under hood .) You need 1/2 / 3/8 and 3/4 . cheap . The very sharp edge will over time due to vibration cut into the vinyl wire , soon a dead short .Use real scotch 33 tape to hold in place . Other “ electrical tape” is junk turns into gummy mess . You don’t need added fuses , the breaker works , for all the wires ( or car would have burned ) but the cure really is to protect any wire crossing a sharp edge into body cavity . Power seat feed has this issue too . Another cure but not preventative is a fusible link from Ford cars at the main car power take off connection to battery at start relay . There are two sizes of those use larger one, just in case a major wire shorts , especially ammeter area . Good thing you found this … . Sent from my iPhone
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