Quote:
Originally Posted by rotorwrench
A circuit breaker only responds to high current draw above its rating. It doesn't care what the voltage is.
Ford of Canada did some things differently than Ford US. I don't know whether the Mercury line even had the same switch to the Ford line but any 6-volt system will function on 12-volts. The wire size is overkill but it will work. Fuses and circuit protectors also remain the same, They're rated for the wire size and not the load.
The 1951 through 1954 F series trucks likely all used the same switch. The switch changed in 1955 and again in 1956 but the two later switches likely only have subtle differences. The instrument lamp dimming rheostat likely changed for 1956 with 12-volts but I know of 55 models that changed over to 12-volt and had no problems with the switch.
I would say check the F100 wiring diagram and see if the wire colors match up to the different circuits. If the harness matches up in colors then it can be made to work. A lot of different companies have fabricated new harnesses over the years. Some are good and some are not so good. If it fits and functions then it's usable. If not then you will pull hairs that you would likely like to keep. Here is a link to a thread that has a diagram for the F100. It should match all of the F or M series pickups for that year but a person has to check it and see for sure.
https://fordbarn.com/forum/showthread.php?p=1281165 |
I believe the person was referring to a 12 volt system having a lower current rated circuit breaker for 12 volts because it only draws half as much current. It is possible you might not have the correct overload protection when switching voltages. If you have a dead short they all will work fine.