Re: 48 49 50 "Hot" Wire

Posted by HH56 On 2011/2/2 23:47:34

Pos was normally ground. Feed is: Battery Neg to starter solenoid and on same post is wire 1R which goes to ammeter (-). Out ammeter (+) 2RY to a splice point and also to (B) term on reg. If generator is putting out, then that current is passed back thru the ammeter to battery via that route. One wire off that same splice point 21A R2W goes to circuit breaker which is live all the time and from there feeding headlight switch, courtesy lights, clock, lighter, etc. Some items are protected with either the aux breaker or with additional breaker on headlight switch, some items not at all. Another wire from the splice, 21B R2W goes to ign switch AM terminal and then is switched. Most of car is fed from GA terminal off switch. Coil is independently fed off COIL terminal.

If you are using the 50 loom it is mostly the same in function and routing but there are some slight differences in designation, destination, and colors to be aware of. Also, it has been found by some that while Packard indicated schematically where a splice might be, in actual fact it could be somewhere else and was only drawn in a certain spot for convenience. You do have to follow a wire and find all the splice points.

Nothing on the car is polarity sensitive except that the coil is a little more efficient if properly oriented. Everything will work either way as long as generator is polarized to the orientation when hooked up. If ammeter reads backward, just reverse those 2 wires.