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05-18-2020, 02:21 PM | #21 | |
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Re: Need Help in Identifying Location of Short
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Yes, the ignition switch is “in” (“off”) when the movable points arm reads .3 volts. When the ignition switch is “out” (“on”), the movable points arm reads 6 volts. It seems the ignition is never really turning completely off. Sent from my iPhone using Tapatalk |
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05-18-2020, 02:24 PM | #22 | |
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Re: Need Help in Identifying Location of Short
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That would appear to be my issue. There is always power coming through the armored cable (either .3 volts when ignition is “off” or 6 volts when the ignition is “on”). Apparently, the coil is staying energized, which would account for the drop in battery voltage to roughly 1.5 volts in less than 24 hours. Sent from my iPhone using Tapatalk |
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05-18-2020, 02:35 PM | #23 | ||||
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Re: Need Help in Identifying Location of Short
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I thought about that, but I was hoping to find the issue without the headache of swapping out the cable twice more. Ultimately, I may not have much of a choice. |
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05-18-2020, 02:38 PM | #24 | |
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Re: Need Help in Identifying Location of Short
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05-18-2020, 02:43 PM | #25 | |
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Re: Need Help in Identifying Location of Short
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05-18-2020, 02:45 PM | #26 | |
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Re: Need Help in Identifying Location of Short
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I'm still looking at what I did to replace the items. Nothing seems wrong yet. |
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05-18-2020, 02:49 PM | #27 |
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Re: Need Help in Identifying Location of Short
I should have mentioned that I have a 6 volt positive ground alternator. Would an alternator have a similar potential issue?
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05-18-2020, 03:15 PM | #28 |
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Re: Need Help in Identifying Location of Short
Alternators have a slight parasitic draw, its part of their DNA.
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05-18-2020, 03:23 PM | #29 |
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Re: Need Help in Identifying Location of Short
Wow. I didn’t know that.
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05-18-2020, 03:54 PM | #30 |
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Re: Need Help in Identifying Location of Short
Over the years when I would find a survivor car, very few times was the original switch and cable in use, they seem to have been a weak point in the model A, just like the fan blade.
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05-18-2020, 03:59 PM | #31 | |
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Re: Need Help in Identifying Location of Short
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Alternators have a series of diodes in the output. A diode has a small amount of reverse current, it is not like a switch. The same thing applies to a cutout that has been modified with a diode. If you leave the car sit for a month or so you will have a dead battery if power is applied. I have a 6-volt positive ground alternator on my Victoria. A few years ago a diode failed and it kept running my battery down, even though it worked fine and put out power. I had to replace it. The problem you are having is abnormal for a properly working alternator. It may be you have a failed diode in it. Disconnect the alternator and see if it resolves the problem. Tom Endy |
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05-18-2020, 04:15 PM | #32 |
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Re: Need Help in Identifying Location of Short
I think I’m narrowing this down. Here are my test scenarios.
Scenario 1: - Key is removed. Rebuilt pop out switch is pushed in. Instrument panel screws are removed. Panel is away from inside of firewall to prevent possible shorts. - Red wire is unscrewed from the side of the ignition cable. - Points are held open with a popsicle stick. Negative lead of voltage meter is held to the movable point arm. - Main power cutoff is “on,” and and the positive lead of the voltage meter is clipped to a bare firewall screw. No voltage goes to the movable point arm, as expected. Scenario 2: - All connections are the same, except the following. - Red wire is screwed onto the side of the ignition cable. - I now see .24 volts on the movable point arm. - Insert the key. Turn “on” the ignition. Switch pops out. - Movable point arm gets 6 volts, as expected. - Press in pop out switch. Remove key. - Movable arm still gets .27 volts. What ideas do you have? Sent from my iPhone using Tapatalk |
05-18-2020, 04:22 PM | #33 |
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Re: Need Help in Identifying Location of Short
What you guys are saying could be true with his alternator. BUT, the diodes in the alternator has nothing to do with his coil being warm and him showing voltage at the points when the ignition switch is in the OFF position. I would investigate the switch farther.
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05-18-2020, 04:34 PM | #34 | |
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Need Help in Identifying Location of Short
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Sent from my iPhone using Tapatalk Last edited by shew01; 05-18-2020 at 05:22 PM. |
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05-18-2020, 05:24 PM | #35 |
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Re: Need Help in Identifying Location of Short
With the alternator out of the equation I would then stick to the primary ignition circuit. Mainly the switch. As far as you are getting into this and once its figured out I'd recommend sticking the switch before the coil. Once your done with this you'll be the expert.
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05-18-2020, 05:41 PM | #36 |
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Re: Need Help in Identifying Location of Short
Your restored pop-out switch is defective internally somewhere.
Contact the guy that sold it to you. Describe the problem you have. Ask him about getting another one from him.
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05-18-2020, 05:43 PM | #37 | |
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Re: Need Help in Identifying Location of Short
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But he has a battery master cut-off switch, so that's always good.
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05-18-2020, 07:19 PM | #38 | |
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Re: Need Help in Identifying Location of Short
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Really ? Hmm. OK. I guess I don't understand, but, thats OK. I don't use a pop-out and have not had an issue with one so I guess Ive never thought about it. |
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05-18-2020, 11:39 PM | #39 |
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Re: Need Help in Identifying Location of Short
What a waste of time. I told ya it was the switch back in post #16. I'm done.
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05-19-2020, 11:22 AM | #40 | |
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Re: Need Help in Identifying Location of Short
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