Originally Posted by jay25RS
12 volt or it will explode!!! Most medium size trucks have a big ole sticker somewhere that says to only jump with 12 volts. Most have the 2 batteries wired in parallel thus keeping the voltage 12 volts but the ah capacity doubles.
Depends if it's an ambulance or not :P there are some 24v trucks out there. I'm not too versed on which are which