Re: 1940 9N Electrical system

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Posted by Tim Daley(MI) on January 14, 2020 at 06:15:48 [URL] [DELETE] :

In Reply to: Re: 1940 9N Electrical system posted by Robert Angney on January 13, 2020 at 10:35:40:

Something isn't wired correctly still and it isnt due to polarization. Components should NOT be getting red hot. We are assuming you have a 6V generator and not an alternator and a 6V battery. I posted scans of the OEM 9N/2N wiring diagrams so right click and save to your desktop then print out from there for reference. Questions need to be answered: Do you have the 1-Wire/3-Brush generator (A-Circuit) and roundcan cutout? Is there a 3rd Brush adjustment screw on the back plate of the generator? Do you have an OEM-style ignition switch and a fused 2-wire light switch? Can you post pictures? Again, verify all the wiring is correct before applying battery power. You polarize the generator with the cutout. POWER OFF; take your pliers and touch the BAT terminal to the ARM terminal for a second. Dont assume the guy who rebuilt your genny did it correctly. Motor test via FO-4 Manual. Generators are made with an A Circuit or a B Circuit design -see LINK to article. It matters how it gets polarized. It can be done internally on the generator but easiest way is with the cutout on a 9N/2N or the VR on an 8N. The wrong method will result in a fried VR. The Clymer I&T FO-4 Manual shows how to test the cutout see previous post, paragraph 66. Click on the LINK for an article from our HOW-TOs forum on 9N generators. Disconnect the lights for now to take them out of the equation. Once electrical system is verified correct, then you can start adding in lights.

Tim Daley(MI)

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