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CA Ignition Voltage Noise Battery Terminals
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dfwallis View Drop Down
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Joined: 09 Mar 2023
Location: DFW
Points: 631 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Topic: CA Ignition Voltage Noise Battery Terminals
    Posted: 18 Sep 2024 at 9:34am
I'm getting severe spikes of engine ignition voltage on the battery terminals when running. Disconnected all gen/reg wires, still there...ideas? Coil ground? It's a new coil
1952 CA13092
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dfwallis View Drop Down
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Joined: 09 Mar 2023
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Points: 631 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Sep 2024 at 10:21am
I guess maybe it's just too much noise for my cheap digital volt meter...hundreds of volts (fluctuating wildly) on your 6v battery terminals is disconcerting:(
1952 CA13092
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ekjdm14 View Drop Down
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Joined: 20 Aug 2024
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Points: 134 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ekjdm14 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Sep 2024 at 10:25am
Negative ground?  The only way I'd expect to see ignition voltage pulses at the battery would be either a bad main battery connection or perhaps something with the condensor (new ones are rubbish, how much arcing do you get at the points?)

I'm probably missing something, but that's all I can think for the moment. May check back in when my brain returns from strike action, if you've not resolved it by then.

edit- may just be the noise affecting the meter you're right, but surely it's far enough away from the coil that it'd not affect it. Gut feeling says bad connection somewhere


Edited by ekjdm14 - 18 Sep 2024 at 10:28am
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dfwallis View Drop Down
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Joined: 09 Mar 2023
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Points: 631 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dfwallis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Sep 2024 at 11:50am
Think the meter, goes haywire if I just hold the pos lead in my hand with neg lead dangling anywhere near the tractor...analog meter that dad dug out not affected
1952 CA13092
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 81242 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 18 Sep 2024 at 2:17pm
YEP... the old $15. meters will do that... You can POINT it at the tractor without even touching the battery and it will JUMP !!
Like them all, but love the "B"s.
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