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| Farmall & IHC Tractors Discussion Forum |
Topic: Ammeter Suddenly Shows Charging
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| F4RM@11
11-17-2012 14:35:13
50.126.213.255
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After getting the SM started again following a carb rebuild, I turned to the electrical system to troubleshoot the lack of charging. The VR output had been adjusted and the gen inspected by an auto electric shop - both had a clean bill of health.
The ammeter showed a slight discharge with the ignition switch on and the needle didn't move with changes in engine speed. Following Bob's troubleshooting flow chart, I made it through to the last step before the ammeter began showing a charge.
When I jumpered the BAT and GEN terminals at the regulator, the ammeter suddenly began showing a charge and continued to do so afterward. The needle moved appropriately with engine speed.
I'm curious as to why a charge on the ammeter suddenly began to show after making this brief circuit. The battery was fully charged after I returned to the shop as the trickle charger indicated so. |
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| F4RM@11
11-17-2012 17:11:54
50.126.213.255
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Re: Ammeter Suddenly Shows Charging in reply to charles todd, 11-17-2012 14:35:13
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| :oops: I feel silly for not knowing that since it says right on Bob's troubleshooting flow chart. Duh! Thanks. |
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| gbs
11-17-2012 16:49:07
71.51.248.4
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Re: Ammeter Suddenly Shows Charging in reply to F4RM@11, 11-17-2012 14:35:13
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| you polarized the generator |
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| F4RM@11
11-17-2012 14:50:26
50.126.213.255
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Re: Ammeter Suddenly Shows Charging in reply to rustyfarmall, 11-17-2012 14:35:13
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mkirsch said: (quoted from post at 15:45:36 11/17/12) Shut it down and start it up again. Does it still charge?
I had the same problem last year, and it was a bad regulator. |
Yes, I had it shut down a few times today, one of which was for 30 mins or so. The ammeter continued to show a charge after each start. I'm not complaining - just curious to understand what happened.
This post was edited by F4RM@11 at 16:29:33 11/17/12. |
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| Bob M
11-17-2012 17:13:40
69.207.86.27
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Re: Ammeter Suddenly Shows Charging in reply to F4RM@11, 11-17-2012 14:50:26
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| Your generator was likely polarized backward; jumpering BAT and GEN terminals fixed that.
Could also however be an intermittant problem involving the regulator ground - especially if the regulator is in the stock location bolted on the front of the steering wheel stanchion. (The Super M is notorious for VR grounding problems here.)
Suggest running a #14 ground wire from the regulator base to a GOOD frame ground - ideally where the grounded battery cable is attached.
This post was edited by Bob M at 17:18:29 11/17/12. |
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| mkirsch
11-17-2012 14:45:36
67.253.161.186
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Re: Ammeter Suddenly Shows Charging in reply to F4RM@11, 11-17-2012 14:35:13
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| Shut it down and start it up again. Does it still charge?
I had the same problem last year, and it was a bad regulator. |
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