ABC if you want to save people or put out camp fires... but it may **** up your electronics if you were hoping to save the truck. Unless contents have changed, ammonium phosphate can be very corrosive! Especially with how all that powder gets in every kook and cranny, then is activated by water. However, better having one vs not.
Ammonium Phosphate??? Isn’t that fertilizer? It’s monoammonium phospate in an ABC Fire extinguisher and nothing gets activated by water Yes, it would make a mess but better to have a mess then a burned up truck. ABC units are for class A B and C fires which are A common combustibles like wood paper etc. B is flammable liquids and C energized electrical, you have all that on a truck. So yes better to have one then not.