Failing to polarize a 6 volt regulator can cause damage to the entire electrical system of a vehicle. Disconnect the battery 2. Negative goes to the coil on a negative ground car. 1949 Ford 9N Tractor - 6V system - Do they run a positive or negative ground? Positive to Negative Ground Conversion. It was rebuilt a couple of years ago and worked ok until the owner replaced the battery. By Ted Dumas on Sunday, September 27, 2009 - 12:24 am:. Ford did not start using an alternator until 1957, when it … This system effectively earths the vehicle as the chassis attaches to the battery using a positive battery cable. The cable is tethered to the battery at one end and the engine block at the other. But then, you probably wouldn't be swapping your car's electrical system, and wouldn't be reading this. Dax - A positive ground works exactly the same as negative ground. The shop manual says it has a positive ground but the 6 volt battery that's in it has been installed as a negative ground. Your Model A was built with a 6 volt positive ground system. It makes NO difference whether the system is a positive or negative ground when you are charging the battery from an external source - Just be sure to hook the pos to the pos terminal on the battery and the neg to the neg terminal on the battery. Pertronix 1266P6 6 Volt Positive Ground Ford pre-1965 6 Cylinder Ignitor. Make sure that the ignition to the car is in the off position. Reverse the wires on the coil 3. Check which way the engine turns. But the 6V battery is also wired with positive to ground. My 48 Dodge D-24 [ by the previous owner ] was converted to a 12 volt system, however, it was kept as a POSITIVE ground system. My first car was a '55 Ford Customline 2-door sedan. on August 17, 2002 at 07:32:19 from (205.188.197.163): A friend has asked for some help getting his 8N started. *Note that most of the old Ford tractor applications were 6V and Positive Ground, meaning the positive post of the battery serves as the ground and the negative post of the battery is the feed for the system. There are only a couple of cases where it is better to stay with positive ground. Electronic Ignition Kit: Ford 6 Volt Positive Ground Ford - Fits various models * Fits tractors with 6 VOLT POSITIVE GROUND SYSTEM ONLY. What did they give you, 6 or 12? "+" is typically red, and "-" is typically black. Hope I … My son-in-law just picked up a 1949 Ford 9N Tractor and it has no spark. Most, if not all welders were positive ground. G M was the oddball with negative ground. Posted by Upper Peninsula Mi. Ford, Chrysler, Cadillac, Oldsmobile, Pontiac, Nash, Hudson, Frazer, and Studebaker were all positive ground at some time in the 30s. When Ford and Chrysler went to 12 volt they also went to negative ground. Ford 'messed' with a positive ground for a time during the 1930s. I am switching it to a NEGATIVE ground system tomorrow. I have a 1953 Ford, Customline. 1948 - 1956 F1, F100 & Larger F-Series Trucks - 1949 F1 Grounding - Trying to put my truck back to as near original as possible after its been thrown together by the PO. The charging guage shows a discharge most of the time . And clean contact is the key to insuring optimum electrical conductivity. He put it positive ground. I just bought a Ford Jubilee with the original 6 volt system. Where exactly do the ground straps go from battery positive to frame, engine and firewall. Again looking for … The quickest why I can think to check for polarity is to (for positive ground) connect a jumper from the negative side of the battery to the starter connection, and the positive jumper to ground. Does anyone remember if this car would be positive ground. I have just purchased a 49 ford pickup 6 cyl. 1950 Ford 6 Volt System With A Positive Ground With No Spark … I checked my coil and its getting power .. then checked my points, i get a spark when the ignition is on and touched with a screwdriver but when its cranked over im not seeing any spark at all from the points when its going thru its cycle of opening and closing . System effectively earths the vehicle as the chassis attaches to the entire electrical system, attach clip! Hand threads - both accomplish the same parts in 12-v brings much More money ( like a motor. Charging guage shows a discharge most of the battery most of the vehicle 's battery couple of where! 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