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upnorthwi
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Joined: 06 Sep 2008
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 Posted: Fri Nov 09, 2012 6:50 pm Post subject: NAA electric question.. |
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1954 NAA 6 volt
Just noticed on the new NAA that when you pull the headlight switch it instantly kills the tractor.
Any ideas and where do I start looking first?
Thanks
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JMOR
Tractor Guru
Joined: 13 Aug 2007
Posts: 12682
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| Posted: Fri Nov 09, 2012 7:50 pm Post subject: Re: NAA electric question.. |
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| upnorthwi wrote: | (quoted from post at 22:50:40 11/09/12) 1954 NAA 6 volt
Just noticed on the new NAA that when you pull the headlight switch it instantly kills the tractor.
Any ideas and where do I start looking first?
Thanks |
Check for bad/weak connections, most likely in the path between the lights and the battery, including battery ground. i.e., some connection is good enough to carry ignition current alone, but not good enough to carry ignition plus lighting current.
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Sean in PA
Tractor Expert
Joined: 27 Feb 2008
Posts: 1684
Location: Southeast PA
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| Posted: Sat Nov 10, 2012 3:39 am Post subject: Re: NAA electric question.. |
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| JMOR wrote: | (quoted from post at 23:50:06 11/09/12) | upnorthwi wrote: | (quoted from post at 22:50:40 11/09/12) 1954 NAA 6 volt
Just noticed on the new NAA that when you pull the headlight switch it instantly kills the tractor.
Any ideas and where do I start looking first?
Thanks |
Check for bad/weak connections, most likely in the path between the lights and the battery, including battery ground. i.e., some connection is good enough to carry ignition current alone, but not good enough to carry ignition plus lighting current. |
Or a dead short to ground somewhere between the headlight switch and the lights themselves. I would disconnect the battery and do some testing with a meter. You don't want to keep draining the battery with a short like that if that is the problem.
Disconnect the wire at the headlight end and with the switch off, measure resistance from the headlight end of the wire to ground. Should be infinite resistance. If it shows any resistance below infinite then you've got a short to ground somewhere between the switch and the headlights (or inside the switch itself).
Then with the wire still disconnected, measure the resistance from the switch to the headlight end of the wire. That should read close to zero ohms. Anything more that a couple tenths of an ohm and there's a problem with the wire like corrosion, rust, dirt or a loose connection somewhere.
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souNdguy
Tractor Guru
Joined: 20 Aug 2002
Posts: 47828
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| Posted: Sat Nov 10, 2012 3:19 pm Post subject: Re: NAA electric question.. |
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my guess is your headlamps are run thru the ignition switch and it's not up for it / has a bad connection.
offload them from the ignition.. let it just handle the coil, and exciting the alternator if it has one.. :)
source power for the lamps on the same side of the ammeter as the ignition switch is drawing from to preserve your net charge / discharge setup
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36 Coupe
Tractor Guru
Joined: 12 Mar 2010
Posts: 5707
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| Posted: Fri Nov 16, 2012 3:35 am Post subject: Re: NAA electric question.. |
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Headlite switch should have a fuse on it.No fuse, a short in the headlite wiring would kill the engine when you turn on the lites.
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