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Hot!No charging issue

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mgmine
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2017/05/29 09:51:38 (permalink)
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No charging issue

I have a Briggs 22 hp on a lawn tractor that isn't charging. I tested the battery and it was at 11.5 volts. I turned the engine on and tested it, still 11.5 volts at the battery. Next I disconnected the yellow wire at the voltage regulator(only one yellow wire) and tested the stator and it was putting out about 40 volts AC so I hooked it back up. I  then disconnected the red wire and tested the voltage coming out of the regulator and it was about 8 volts. I replaced the regulator with an aftermarket one thinking it wasn't putting enough out. Retested everything and got almost the identical results with the new regulator. Still only putting out about 8 volts. What am I testing wrong? Thanks for any information.

13 Replies Related Threads

    eddyjoe56
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    Re: No charging issue 2017/05/29 12:49:51 (permalink)
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    need more info...make, model, type
     
    Check link to you tube  https://www.youtube.com/watch?v=sb1bVmnIqHk
    It goes through some steps to check system correctly
    post edited by eddyjoe56 - 2017/05/29 13:00:34
    mgmine
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    Re: No charging issue 2017/05/29 17:19:43 (permalink)
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    Model 446777
    type 0763 B1
    code 100504 G
     
    23 hp not 22.
     
    I had watched the video on YouTube so I thought I would get similar readings. But after getting the 8 volt reading with two voltage regulators I figure I must be doing something wrong as far as measuring the voltage. Not sure how both could be giving the same reading if one was bad.
    post edited by mgmine - 2017/05/29 17:23:47
    Mikel1
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    Re: No charging issue 2017/05/29 23:23:12 (permalink)
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    Are you testing at full throttle at the battery post then at terminals(battery cables) going to the battery post?
    The 8vdc with the red wire disconnected sounds right. My briggs 19hp is 5vdc.
    The recommended test for reg/rect from Briggs is the DC amps test which uses the red wire lead from regulator.
    post edited by Mikel1 - 2017/05/29 23:35:19
    mgmine
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    Re: No charging issue 2017/05/30 08:49:20 (permalink)
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    I'm not sure if I tested at two differ spots but I will. How can 8 volts be charging? I thought it had to be over battery voltage, or at least 13 volts.
    eddyjoe56
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    Re: No charging issue 2017/05/30 15:27:59 (permalink)
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    According to the test procedure you need to re-connect the 8v wire to the battery and then recheck total voltage,at the battery. Increase engine RPM to full and it should read above 12 volts. If it does then the battery is being recharged and the system is functioning correctly. The 8v output is only a sensing voltage which will increase when connected to the 12v battery
    mgmine
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    Re: No charging issue 2017/05/30 17:07:43 (permalink)
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    When you say reconnect the 8 volt wire to the battery, do you mean plug the red wire together? When I did the first test at the battery the red wire was still plugged together (from the regulator to the battery) and it wasn't charging the battery. Any idea if there is a fuse or something in line that could be bad? I tried a continuity test from the battery back to the unplugged wire but got nothing. I'm not sure if it is a straight run so I wasn't  sure that I should have continuity.
    Mikel1
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    Re: No charging issue 2017/05/30 22:43:37 (permalink)
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    Per briggs service manual there will be no charging output if battery voltage is less than 5 volts. With the red wire disconnected there is no incoming volts from battery. So what mower is this on, would like to check wiring diagram? Does your meter have a 10 amp receptacle for testing? Any dcv on red wire to battery like in eddyjoe's video link?
    mgmine
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    Re: No charging issue 2017/05/31 08:43:22 (permalink)
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    Its on a Cub Cadet LTX1046VT mower. I searched but couldn't find a wiring diagram.  I do not have any voltage to the battery on the red wire with the ignition turned on like in the video.
    Mikel1
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    Re: No charging issue 2017/05/31 09:42:37 (permalink)
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    So from 1:07 to 1:34 on video you have nothing? I did locate a wiring diagram, is the red wire that you disconnected striped with white or run into a red/white wire?
    mgmine
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    Re: No charging issue 2017/05/31 12:01:34 (permalink)
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    This is what I have found. The plug on the engine side has the red wire which plugs into the connector, the same red that goes into the voltage rtegulator however it seems to go into a gray wire. There are 2 red/white wires on the connector side that are always hot but they do not connect to the red wire. On the connector side (not the motor side) the red wire gets 12+ volts with the ignition on. However it does not get 12 volts with the ignition on coming out of the voltage regulator. There is continuity from the red wire motor side to the red wire connector side. I tried to post a picture but can't without a URL
    Mikel1
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    Re: No charging issue 2017/05/31 19:20:00 (permalink)
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    So the red wire goes to gray then where to? Is connector jumpered to another wire?
    The wiring diagram I was looking at was for a 2010 model. It shows red/white wire from regulator side tying into another red/white wire past fuse. May be different wiring if it is a different year. Has to be a path back to battery either direct or thru ignition switch to charge.
    Mikel1
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    Re: No charging issue 2017/06/02 12:07:25 (permalink)
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    I seen this on a few other forums I visit, I see someone linked you to the service manual. You should get over 13+ volts at battery when charging.
    post edited by Mikel1 - 2017/06/02 12:08:28
    eddyjoe56
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    Re: No charging issue 2017/06/02 18:17:19 (permalink)
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    You could run a jumper wire from the red wire (8v) to the positive terminal. Then start and run it at full throttle and see if voltage is about 13v at battery. This will at least confirm that charging system is working.  The next issue is to trace back through the wire from regulator to the battery to make sure that there is no open like start/key switch, fuse or other broken wire. Worst case is to leave the jumper connected while you run the mower. Without wiring diagram you will need to trace the circuit manually, the start/key switch should allow charging voltage back to battery but the terminal layout would be in the wiring diagram, without it you would have to try a new switch or a know good used one.
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