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Subject: 8N Headlights

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Tom S.    Posted 09-28-2019 at 19:57:03 [URL] [DELETE]        [Reply] [Email]  
  • 8N Headlights
  • I have a 49 six volt with the headlights mounted on its Dearborn loader. They've never worked since I bought the tractor and now I'm ready to take it on. So far I've checked the bulbs (I think I did it correctly), replaced the fuse in the light switch (20 amp), tested to see that I have power as far as the switch, but no results yet. I have a couple of specific questions. 1. Will the lights work with the ignition switch in the "Off" position? 2. I removed the bulbs and did a continuity test by touching a probe to the contact on each side of the bulb. The meter showed continuity. Does that mean the bulb is good? 3. If I run a jump wire from the wire coming into the light switch and attach it to the wire going to the headlight (bypassing the switch), shouldn't the bulb light up if it's good?

    Thanks for any help. I'd like to note that the starting trick I learned here on the N Board (crank for 3 seconds choke off, then for 3 seconds choke on) really does work.

    Tim Daley(MI)    Posted 09-28-2019 at 23:29:40 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Headlights
  • Start with these if you donít already have the essential manuals. Plus, HOW-TOís/ELECTRICAL, JMORís wiring is a must have document to download. You may as well verify the entire wiring is correct while youíre at it. Having OEM repro parts like the key switch and light switch are recommended.



    Tim Daley(MI)

    Tom S.    Posted 09-29-2019 at 13:22:24 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Headlights
  • I have the IT manual but I haven't seen the others. Thanks, this will

    Tim Daley(MI)    Posted 09-30-2019 at 04:59:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N Headlights
  • You won't find lighting wiring diagrams in any manual including the I&T FO-4 manual because lighting kits were never a factory installed item on N's. The exception is the MPC's as they show the lighting kit setups. The diagrams I show are for the 8N electrical wiring system. The intent was for you to verify you have your wiring all correct before putting the lights into the equation. Often times guys muck up their wiring because they don't know how to do it or they use non-OEM-like parts and have unnecessary, extravagant airplane-style light switches and key ignition switches and wire them wrong. The MPC's show the lighting kits with a partial setup, but you'd need the OEM lighting kit instruction sheet to see the entire detailed drawing and those are/were only available in the kits. I can't post them here because they are on 17 x 22 sheets. FWIW: You won't blow out your lamps IF they are 6V or 12V and you are running a 6V battery. If you have a 6V battery and you apply 12V lamps, they will illuminate, only a but dimmer, but if it is the reverse, if you have a 12V battery and you apply 6V lamps, you will blow out the lamps. OHM's Law 101.


    Tim Daley(MI)

    Tim Daley(MI)    Posted 09-30-2019 at 05:08:47 [URL] [DELETE]        [Reply] [No Email]  
  • From our HOW-TO's forum, ELECTRICAL, is this document on how to run the rear lights on an 8N. These parts (click on LINK) use and show all the OEM reproduction parts made by Dennis Carpenter.

    Tim Daley(MI)

    Bruce (VA)    Posted 09-28-2019 at 20:12:38 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N Headlights
  • Your headlights should be wired independently from the ignition switch. If you run the lights through the ignition switch, it will burn out.

    99% of light problems are rust at the mounting brackets. You need clean grounds for the lights to work.

    Check for battery voltage t the socket. If it's ok, the problem is the grounds.

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