Posted by Sherman in Idaho [24.32.202.166] on Saturday, September 14, 2013 at 10:27:19 :
In Reply to: Re: M37, 24 volt to 12 volt? posted by Franz [209.86.226.27] on Saturday, September 14, 2013 at 02:39:05 :
Affirmative on the fuel gauge and sender. M-series trucks have color-coded voltmeters rather than ammeters and the voltmeter scale is compressed such that 12 volts barely registers while 24 is in the yellow-to-green range, so even though leaving the 24V gauge in place wouldn't hurt anything, it wouldn't be very useful either.
A theoretical difference is that the wiring is sized for the lower current of a 24 volt system, but in reality it seems adequate for 12, with the exception perhaps of the starter cable.