Posted on 18 Comments

How To Reset The OBC On My Club Car Golf Cart

How To Reset The OBC On My Club Car Golf Cart

All Club Car golf carts newer than 1995 have an OBC or ” On Board Computer ” in the charge circuit to monitor and control several functions on the golf cart. The tutorial below explains a little about the OBC, how to reset it after charging problems, and what to do if its completely failed.

The OBC functions like the on off switch on your wall to control the lighting. But in this case it controls the charging and drive system.

Club Car charging problems?

If the OBC detects a problem in either the charging or drive system, it will shut that feature off.

What should happen next!

When the fault clears, the OBC is supposed to turn that system back on.

What if the fault is not cleared?

Sometimes, the OBC does not clear the fault. When this happens, it can cause your charge circuit to not work and allow the charger to charge the batteries, or even the controller to not power up or the solenoid will not engage.

Club Car On Board Computer

How to reset your Club Car’s OBC after a fault

The reset process is easy to do, but can take a fair amount of time.

Resetting the OBC

To reset the OBC the following must be done in this order:

  • Key Switch to Off
  • Forward/Reverse to Neutral
  • Tow/Run Switch to Tow
  • Disconnect the Battery NEGATIVE (–) wire from the Battery Minus terminal on the battery pack.
  • Put the Tow/Run to Run
  • Forward/Reverse Switch to Reverse
  • Key Switch to On
  • Lock the throttle pedal down

To reconnect the OBC back into the system:

  • Key Switch to Off
  • Forward/Reverse Switch to Neutral
  • Tow/Run switch to Tow
  • Reconnect the negative battery wire to the battery minus terminal on the battery pack.

What next?

Once the OBC has been reset, you can move on to troubleshooting the golf cart and charging system.

Has it completely failed?

There is always a chance the OBC has completely failed and the reset process will not fix the problem. Consult your Club Car manuals or call your local dealer.

Purchase a replacement OBC or new charger

Want to purchase a replacement OBC but do not want to pay dealer prices? Shop now

Or would you rather bypass the OBC and get another charger? Find a new Club Car golf cart battery charger  and get the OBC bypass kit now.

Posted on 18 Comments

18 thoughts on “How To Reset The OBC On My Club Car Golf Cart

  1. After I disconnected the battery negative hw can the reverse buzzer sound since the circuit is broken?

    1. We’re not sure exactly what you mean by this. Would you mind elaborating?

  2. my cart runs great and it charges, The problem the charger goes down to 6 amps and stays forhours.
    all the batteries are new and a new computer was installed same problem. Reprogramed the computer no effect.
    What could be the problem,
    By the way tried another charger same brand and same problem.
    Im told if i kept the charger on it could ruin my new batteries

    1. Jerome – Thanks for your question. Now at a glance it sounds like all is operating as designed. How long does it take to fully charge the batteries in a golf cart is a loaded question in itself. All depends on output of the golf cart battery charger in question, and the depth of discharge of the batteries. ( Or CSoC = Current State of Charge) Also take into consideration that new batteries are very energy hungry in the beginning ( Will soak up electricity like a sponge) as the lead is still not cured and the plates need to be energized…. To cure the lead in those batteries it will most likely take 15 to 25 charge cycles. Charge, use (discharge, Charge)… Nor could 6 amps ever ruin your new batteries… granted you keep the water or ( Electrolyte levels above the lead plates to keep them saturated ) Which should always be checked say at least monthly and do so after the batteries are completely charged to avoid over filling …. As the electrolyte levels will rise and fall based on the CSoC of the battery in question. ( Example – Running a trickle charger at 5 amps on a battery bank for a long time while on vacation will eventually dry the batteries out if not maintained and that will ruin the batteries not the volts or amps being applied) It is the nature of the battery chemistry, when your golf cart battery charger is charging or when you are using the golf cart driving and applying a load – Off gassing is taking place during the chemical reaction. Surely more so during charging times vs use but still happening. This is where a battery watering system comes in handy to make the job of general watering and maintenance of the golf cart battery bank easier and precise. Learn more here… Anyhow, It sounds like the charger has just completed the bulk phase of the charge cycle and is now tapering off the charge cycle to the finishing phase which yes can be hours…. ( So how many hours are we talk about this charger has run? ) I would recommend using the cart today as you would. Then after use put back on charger and just let it run its course… I would also recommend checking the water level before you put on charge to make sure the water level is say 1/4″ above the plates. and let it go…. It will most likely run for 8-10 hours if the batteries are discharged a bit…. maybe a bit longer…
      Basic math will help you determine the charge time expected.
      6 volt golf cart batteries are on average – 220 Ah rated , 8 volt golf cart batteries are 165-170 Ah rated, and 12 volt golf cart batteries are 140-155Ah rated ( All based on the 20hr rate) …. so regardless how many batteries you wire together in a series… whatever the operation voltage of the battery bank it will be the Ah rating of the individual battery…

      Example – A 36v golf cart with 6x 6 volt batteries rated at 225 Ah = a 36v battery bank with a capacity of 225 Ah @ 36 volts…. So to complete this train of thought if you drained the battery bank 50% and planned to recharge you will need to replace 50% of the 225 amps which would be 112.5 amps… Using a charger that puts out say 20 amps max…. it would take only 5.5 hours to recharge at max output… but the charge rate in not constant or operating at max load for the complete charge cycle…. not since the Lestronic chargers of the 60’s when they just had a timer you set and you turned on the charger to run for a desired amount of time …. All new style chargers are smarter…. even the Club Car Powerdrive with the OBC regulating the charger knows to back off the output as the charge cycle is getting closer to completion… the main difference with the OBC Lester made for Club Car and say a new Lester Summit Series II Golf Cart Battery Charger is the OBC was always looking for voltage numbers… once a desired voltage was reached it would back off the charger output or shut it off completely… The new Lester Chargers are much more advanced and have everything internal in the charger to give your batteries a perfect charge every time… granted the user sets the correct charge profile or (Algorithm) to do so… they also regulate themselves to maintain a healthy homeostasis in the battery bank they are attached to like turning themselves on every so many days or if the voltage in the bank ever drops below like 2.08 volts per cell….

      Hopefully this information was helpful…

      Power On…
      Pete

  3. My golf cart will not go forward or backward. I’ve tried resetting the OBC but still nothing. It charges good and everything, any answers will be appreciated.

    1. Alex – Thanks for your inquiry…. If your cart is not moving it can be only one of a few things… Golf carts are very simple vehicles… I am assuming if you say the cart is charging fine that you have good voltage in the system… Check with a volt meter to be sure at the positive and negative most terminals on the batteries. If suffice then can be only the following things, Ignition switch…. ( When in the one position and you move forward/reverse switch or level does the reverse buzzer sound? ( Yes/No? ) If yes it is good and system is intact…. and tells me forward/reverse switch is good…. Mcor – Throttle position switch that tells the motor controller what to do based on foot position on the go pedal… Motor Controller or Solenoid… All of which I have know to go out…. but usually if the cart has sat for some time and just all of a sudden is not operating … usually battery or wire related…. This is where a volt meter comes in handy to check voltage thru the system…. start at the batteries and work your way thru the system.

      Power On…
      Pete

  4. My batteries are 1 year old. The OBC is 2 years old. I have had no problems with the run time until recently. Before I finish a round of golf, the warning light is coming on and the charge meter is down 4 bars out of 10. I have tried 2 chargers and it made no difference. I tried resetting the OBC and no change. I had the batteries tested by a golf cart repair shop. All tested good. When resetting the OBC, is that done with the charger connected of disconnected? Any suggestions on what to do now?

  5. I have a 48V Club Car that just had a new OBC installed. It ran for two days. It also will not move unless… The only way it will move is if I throw the charger in the back (unplugged from the wall) and plug the other end into the cart. It will run all over the place. Unplug the charger and it wont budge. It has me stumped.

    1. Gabe – Sounds like they wired something backwards…. the circuit should be complete when the charger connector has been removed from the cart…. Not complete when it has been plugged in…. defeats the purpose of the inhibit circuit…

      Pete’s team…

  6. I have a Club Car Precident, charges fine. My problem is in forward or reverse it starts off fine, after a few seconds under almost full throttle to full throttle seems the power drops off . I then step on the accelerator pedal and the process repeats. One day it worked fine, the next day this problem began. Got any Ideas?

    thanks

    1. Mark – Thanks for your inquiry…. Sounds like voltage drop or Mcor… Charge the batteries fully. Perform a load test on each battery applying the load for 15 seconds equal to the advertised Ah rating at 20hr rate on the batteries… If it is a 2004 -2008 it came with 4x 12v – they are usually 150Ah batteries… – they should maintain 11v during those 15 seconds under load – if it is newer than 2008 cart has 6x 8 volt batteries…. usually 165-170Ah rated ( those should maintain 7 volts during the 15 second load ) …. If batteries test good – I would then check the mcor…. ( Mcor – Is the throttle position sensor in a golf cart basically)

      Power On…
      Pete

  7. I have a 2010 club car precedent and it made a loud click noise and had no current to move and battery charge light is out completely, Any idea of problem with this cart? I have checked voltage on batteries and have showing full 48volts.

    1. James – Was the click sound heard while driving? If so what was the result directly after? Did the cart just slow to a stop or did it still run and drive but with grinding or crackling noise? OR ??? Could be several possible scenarios here. Solenoid, Controller, Fuse or connections, or motor magnet ( Speed Sensor ) for example…

      Pete

  8. I have a 2017 club car onward that sat in the shed all winter. The charger was plugged in, but the outlet tripped, and the charge got too low. Now everything is shutdown, and nothing works. I tried resetting the obc, and that didn’t work. Any more suggestions?

    1. Robert – No Worries….. You will just need to get some electricity back into the batteries…. Use a regular 12v charger to each battery for an hour or so just top get some juice to them… You need not disconnect the wires either just go positive – negative on each battery. That should do it… once all have been charged for a little while the cart should have enough juice to move or try to… and then you can plug in the ERIC charger that came with the cart. to take the batteries through a complete charge cycle…. FYI – your CC does not have an OBC ( All carts 2014 and Up do not…. ) The switch you re-set was probably just the run/tow switch…

      Power On…
      Pete

  9. Love your comments Pete
    from Paul in Australia

  10. After coming off vacation (3 weeks) my Club seemed to be dead. I was checking things out when I opened a yellow fuse holder next to the charging port and the fuse lost its connection the cart started working. The fuse is not blown and the charger came on immediately. The cart works fine with fuse not connected. Any ideas

    1. Rick – That does sound strange…. The fuse is designed to be in the charge circuit to protect the system from a power surge. But if the fuse looks good and the cart only works when disconnected. Very strange – makes me think something else burned up and created a dead short? That charge circuit surely should not effect the operation of the cart. I would think find a local golf cart tech or pull out your DVM ” Digital Volt Meter” and start checking the circuit from one end to the other… start where you have good voltage until you loose it – there will be the problem…

      FYI – This is all an assumption that you have the run / tow switch in the run position….

      Power On…
      Pete

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