I'm not sure if there is a problem here but thought I would ask. The lights on my 1950 3600 6v truck will dim to just about visible when I stop at a light or stop sign, rather when the truck is idling. Step on the gas and get the generator spinning and they brighten right up. I would think that the battery alone would have a enough juice to keep the lights somewhat bright when idling but it doesn't, at least not on my truck. So I wonder if I have a short somewhere in the lighting circuit and I have checked the wiring for the lights to see if there is any continuity to ground and can't find any. Some years ago I replaced the original light switch with an after market unit since it would get quite hot and I thought I had a switch that had some high resistance contacts in it. So the dimming thing makes me wonder if there is another problem. Any ideas?

1950 3600
1951 4400
Gazz