trying to find a problem with my temp gauge, dropped column and pulled rally dash out, wrote down where all the colors went and after reassembly car started
normally 4 or 5 times. Then it acted like no spark, no start, but if I let key off from start to run position and then moved key again, would get sort of a misfire thru the carb like one cylinder was getting spark and firing that cylinder only. It seemed to start about 1 out of 20 times and then it would bury the amp gauge at about 40 amps and slowly drop to about 20, more than double the normal. One possibility, during reassembly, there were two brown single wires to hook to the side of the wiper switch, (besides the pair that go to the washer button). I just picked one and plugged it in, didn't realize on disassembly there was an unused identical brown on the harness. After a couple of 1 in 20 starts, it then started 6 or 7 times in a row, but still was overcharging. Coincidence?, or ignition cylinder going bad? Car acts very much like ballast resistor problem, no spark while turning over, but when key drops back you get spark and if its still turning it fires and runs. 40 year old dash harness, hate to drop $500 on a new one. anyway battery is disconnected till I get this figured out. Suggestions Thanks Greg

Here's a couple wiring diagrams that may help you. Just print them out and tape them together. Car could be charging high because you're running the vattery down trying to start it so many times?
I did see on the diaigram that a brown wire feeds the ballast resistor while cranking (terminal Q)and a dark blue with tracer (terminal N) feeds it in "run". You could unplug the starter relay so the engine won't crank, and check the voltage on both wires on the ballast resistor with the key in "run" and "crank" positions. Should have 12v on brown wire side in crank and 12v on blue wire side in run.
Charger diagram A
Charger diagram B

Thanks Rich, it'll be a couple days before I can get back to it, but this will be a big help. Funny thing too, seeing your signature, is that its a charger 500 also. this schematic will help in tracking down my temp gauge problem too. I'll let you know how it works out Greg

Good Luck.

got it figured out and temp gauge working right. Thanks for the wiring diagram Rich. Big Help. swapped out bad guage for good. even managed to swap out the fresh face over by filing off bck side of rivits. Starts and runs good, charging back down where it was. Greg