overcharging the battery HELP
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here
http://www.mymopar.com/downloads/servicemanuals/1966_Plymouth_Service_Manual.zip
unfortunately that manual is quite dirty on the page you need LOL start with page 289
Let me see if I can post enough to get you pointed
Above are crops from that page. This shows what your bulkhead connector looks like, and the separate plug showing the wiring is the ignition harness section as shown. you want cavity N which will have a dark blue, white with tracer, no16 wire coming out. As you can see this leads up to the ballast resistor bottom terminal, and feeds off to the voltage regulator. So you trace out that wire, and figure a good place to chop it, and then run the end coming out of the bulkhead to the coil of a bosh relay. That will fire the relay. Then feed the power contact of the relay with a breaker or fuseholder off of your big starter relay stud, which is "hot" battery. now connect the other end of the wire you cut to the load (switched) side of the contact on the relay. Ground the remaining relay contact
You can download manuals and diagrams from MyMopar. Don't need to sign in or anything.
MyMopar - Mopar Forums & Information - MyMopar Tools/Reference
here
http://www.mymopar.com/downloads/servicemanuals/1966_Plymouth_Service_Manual.zip
unfortunately that manual is quite dirty on the page you need LOL start with page 289
Let me see if I can post enough to get you pointed
Above are crops from that page. This shows what your bulkhead connector looks like, and the separate plug showing the wiring is the ignition harness section as shown. you want cavity N which will have a dark blue, white with tracer, no16 wire coming out. As you can see this leads up to the ballast resistor bottom terminal, and feeds off to the voltage regulator. So you trace out that wire, and figure a good place to chop it, and then run the end coming out of the bulkhead to the coil of a bosh relay. That will fire the relay. Then feed the power contact of the relay with a breaker or fuseholder off of your big starter relay stud, which is "hot" battery. now connect the other end of the wire you cut to the load (switched) side of the contact on the relay. Ground the remaining relay contact