revted47,
Forget about the ballast resistor, it's not used on your system. I would assume this inverter is wired in front of the feed to the radio.
Sometimes you can get lost in voltage readings. The important point is that there is spark when the truck is up to temperature. If there is a flooding condition from a hot carburetor problem combined with marginal spark, the truck probably won't start. Cooling is actually allowing the fuel to evaporate and hence the truck starts.
Next time you drive it and this problem is ripe to happen, before you crank it over, mash the throttle to the floor and hold it there for at least a minute. Then without lifting it, crank the engine over and see what develops.
The voltage readings seem to be gooney..how can a system read 15 volts when it's only a 6 volt system...don't know! Don't get lost here...try the fuel angle first. You can always go back and tackle this voltage thing if the flooding doesn't seem to pan out. Don't give up!
Stuart
