Yes, this tractor has a positive ground system.
It may have been retrofitted to 12 volt negative ground over the years though.
Make sure thatit is isolated from other electrical components
Vehicle Electrical System GroundingFor MOST automotive electrical systems, NO, the positive battery terminal is NOT the ground. In most vehicular electrical systems the positive terminal is the "HOT" terminal, not the ground.The NEGATIVE TERMINAL IS ESTABLISHED/USED AS GROUND, in almost all vehicles.It is important to note that there are occasionally some exceptions to this standard, and you need to determine which grounding system is used on any vehicle BEFORE messing around with the electrical system.
If the 49 dodge truck is still on it's original 6 volt electrical system it is positive ground. All 6 volt auto systems are/were positive ground. All 12 volt systems are negative ground.
Yes, most North American automobiles do. Positive-ground electrical systems never really caught on in the mainstream.
If your 1949 truck is a CHEVY or GMC and it still has the original electrical system, it would be 6 volt, negative ground. If it is a Dodge or a Ford with the oringinal electrical system it would be 6 volt, positive ground.
Find the cable that is connected directly to the frame or sub-frame of the car. If it is red, then Positive is ground; If it is black, then Negative is ground. More than likely (but not in all cases) the electrical system is Negative ground.
The system is negative ground.
it has a negative ground system.
The Chevrolet Lumina fuel pump is powered by the electrical system. The fuel pump has a ground wire and a positive wire. The positive wire goes to the fuel pump relay switch.
A major short circuit, disconnection of one of the three main wires (alternator to battery positive, battery negative to ground, engine block to ground).
red is positive on a negative ground system
+ to +- to -+ to +- to -