"Since there is no ammeter to connect the large output wire to, what would be the next best place--the ignition switch itself?
MY RESPONSE
NO I would NOT wire the alternators output to the Ignition Switch as its (and perhaps the wiring to it) likely NOT a very high current rated device.
NO Although sure it will "work" and many rookies or inexperienced farmer Billy Bobs might,,,,,,, I would NOT wire the alternators output (if its say a 50 or 60 or more amp unit) to the old wiring that went to the BAT terminal on an old Voltage Regulator. THE REASON WHY is many (not all) old generators weren't much over 20 to 30 amps max and many (not all) modern 12 volt Alternators may be 50 to 60 or more amps and that could be excess current/heat for what the old wire from BAT on a VR up to an ammeter or elsewhere could be rated for. Again yes it would "work" if spliced to the old wire that connected to the BAT terminal on an old Voltage Regulator BUT TO BE SAFE ID PREFER A BIGGER WIRE UNLESS SAY IT ALREADY HAD A 10 GAUGE THERE ???? I cant say from here and what you posted
YES similar to Professor Jims post I would run an all new wire 10 gauge minimum or even 8 Gauge SUBJECT TO the alternators output from the alternator to the hot battery post or often to the starter solenoid/switches hot input battery side as it has a huge cable up to the battery and use adequate overcurrent and short circuit protection.
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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