Voltage Regulator
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4th Gear
Joined: Jun 2018
Posts: 8
Likes: 2
From: Montreal
Voltage Regulator
Hi guys, I've been having issues with my bike. I have a 2008 FLHTC and I change my voltage regulator at least twice a year. I've barely rode 500 miles with the bike and low and behold yet again the bike isn't charging any more. I've got a new battery in the bike ,my volt meter says I'm running between 45 and 50 volts at 2500 rpm and the ohms meter is reading zero from all three probes. I'm at a loss. all the codes are P0562 and P1353 the other code are for the ABS system. I may as well buy shares in the folks that I buy my voltage regulator from.
the only change I've made on the bike since this issue arose is that I put LED lights, but I can't see them taking that much power.
Can anyone help me with some suggestions at what I should be looking for/
the only change I've made on the bike since this issue arose is that I put LED lights, but I can't see them taking that much power.
Can anyone help me with some suggestions at what I should be looking for/
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,166
From: SE Michigan
Hi guys, I've been having issues with my bike. I have a 2008 FLHTC and I change my voltage regulator at least twice a year. I've barely rode 500 miles with the bike and low and behold yet again the bike isn't charging any more. I've got a new battery in the bike ,my volt meter says I'm running between 45 and 50 volts at 2500 rpm and the ohms meter is reading zero from all three probes. I'm at a loss. all the codes are P0562 and P1353 the other code are for the ABS system. I may as well buy shares in the folks that I buy my voltage regulator from.
the only change I've made on the bike since this issue arose is that I put LED lights, but I can't see them taking that much power.
Can anyone help me with some suggestions at what I should be looking for/
the only change I've made on the bike since this issue arose is that I put LED lights, but I can't see them taking that much power.
Can anyone help me with some suggestions at what I should be looking for/
Seasoned HDF Member
Joined: Aug 2006
Posts: 24,492
Likes: 30,780
From: Pennsylvania
Is this the same problem you had in 2018?
https://www.hdforums.com/forum/touri...-charging.html
You stated you had a short in the system. Probably should go over the wiring and check all grounds and connections. Buy a quality voltage regulator but first do the diagnostics.
https://www.hdforums.com/forum/elect...sting-1-a.html
https://www.hdforums.com/forum/elect...sting-2-a.html
Or take it to someone who knows how to troubleshoot wiring & electrical issues on Harleys.
https://www.hdforums.com/forum/touri...-charging.html
I recently broke down on a trip with my 2008 FLHTC, and the mechanic said that it was the stator so we changed the stator. The regulator is barley a year old as is the battery.After changing the stator we noticed that the bike wasn't charging , but yet we were getting 54 amps at 2800 RPM and 14.5 volts from the regulator and every time we hooked everything up together it wouldn't charge, so we noticed a short in the system once repaired I did about 600 km before the problem re-occurred and now is broken down once again. Any suggestions or has anyone had this type of problem?
https://www.hdforums.com/forum/elect...sting-1-a.html
https://www.hdforums.com/forum/elect...sting-2-a.html
Or take it to someone who knows how to troubleshoot wiring & electrical issues on Harleys.
Seasoned HDF Member
Joined: Oct 2012
Posts: 13,092
Likes: 13,024
From: Texas, USA
You've had a charging problem for four years now. Obviously, changing the voltage regulator twice a year isn't fixing your problem. Do you want to fix the bike once and for all or continue to have problems?
If you don't feel that you have the skills to diagnose and fix the problem then take it to someone that does. To help diagnose, follow the links CoolBreeze3646 provided.
Update this thread when new information is available and post the solution when one is found. Good luck.
If you don't feel that you have the skills to diagnose and fix the problem then take it to someone that does. To help diagnose, follow the links CoolBreeze3646 provided.
Update this thread when new information is available and post the solution when one is found. Good luck.
Seasoned HDF Member
Joined: Apr 2012
Posts: 9,980
Likes: 5,218
From: Michigan
Nearly all of my "charging issues" have been directly related to a weak or discharged battery.
But since you've replaced the voltage regulator and have a new battery the most likely issue would be the stator.
I have only had to replace one stator (at 39,000 miles) and one voltage regulator (at 25,000 miles) both on T/C engines
Be sure to check that your battery terminals are clean and tight and also the ground cable at the frame
As someone stated before you need to have your stator checked and it that checks out OK you could then start looking for a "power draw". and the cheapest, easiest way of doing that is by fully charging your battery and disconnecting one of the battery terminals and letting the bike sit for a day or more and then check the battery's charge.
Some batteries will either not hold a charge or possibly have a dead cell that can be difficult to diagnose.
Good luck.
But since you've replaced the voltage regulator and have a new battery the most likely issue would be the stator.
I have only had to replace one stator (at 39,000 miles) and one voltage regulator (at 25,000 miles) both on T/C engines
Be sure to check that your battery terminals are clean and tight and also the ground cable at the frame
As someone stated before you need to have your stator checked and it that checks out OK you could then start looking for a "power draw". and the cheapest, easiest way of doing that is by fully charging your battery and disconnecting one of the battery terminals and letting the bike sit for a day or more and then check the battery's charge.
Some batteries will either not hold a charge or possibly have a dead cell that can be difficult to diagnose.
Good luck.
Seasoned HDF Member
Joined: Jun 2015
Posts: 10,284
Likes: 7,766
From: West Central FL
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Novice
Joined: Nov 2018
Posts: 16
Likes: 14
From: Los Angeles
I just went through this excercise on my Ducati S4RS, they're notorious for blowing reg/recs.
Diagnosing stator issues is simple with a multimeter (even I can do it).
Here's the matching video for the regulator (my issue)
Diagnosing stator issues is simple with a multimeter (even I can do it).
Here's the matching video for the regulator (my issue)
