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No power to throttle


Scott Campbell
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I am new to Sondors bikes and just bought a couple of 2016 Fat Tire Aluminum frame bikes. One just quit working for me.

The battery appears to charge. The lights on the battery are all green except the upper left remains red after charging for an extended period. 

I checked the fuse in the battery and it is good. 

I get no power/lights at the throttle when battery is installed and turned on. 

Bad battery?

Thanks-Scott

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Scott, there are three failure points to check between the fully charged battery and the throttle. First, sometimes the battery is not fully seated in the cradle, make sure it snaps in and locks. Also look at th contact points in the cradle and battery base. Look for deformation or melted plastic, on either. Josh Wardel reported an separated power wire in either the cradle base or battery at those contact points. Next  is the battery on/off rocker.  I know, I know, but this is the most common issue with no power and it is possible the the rocker has become intermittent. Third  is the throttle power button. They are sometimes stubborn. My own has problems turning on and I might have to manipulate the button by not only pressing it but moving it up and down or side to side while pressing.  You can also make sure the higo connector between the controller and throtthe is securely plugged together, making sure not to rotate the connectors and insure  positive alignment of the pins.

If all those appear to be connected properly you can look inside the throttle ( top pops off) for anything  amiss like disconnected wires.

if all that checks out, you’ll need to trace the power from the battery cradle output wires to the controller with a multimeter.   Every electric bike owner needs one to check Circuits. You can use the probes to pierce the wires insulation to check for voltage. 

LEMMENO!

image.jpeg.460181aebee7ca43d0f0c2b7c7188c24.jpeg

     Reddy

 

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  • 1 year later...
On 5/21/2018 at 6:10 PM, Reddy Kilowatt said:

Scott, there are three failure points to check between the fully charged battery and the throttle. First, sometimes the battery is not fully seated in the cradle, make sure it snaps in and locks. Also look at th contact points in the cradle and battery base. Look for deformation or melted plastic, on either. Josh Wardel reported an separated power wire in either the cradle base or battery at those contact points. Next  is the battery on/off rocker.  I know, I know, but this is the most common issue with no power and it is possible the the rocker has become intermittent. Third  is the throttle power button. They are sometimes stubborn. My own has problems turning on and I might have to manipulate the button by not only pressing it but moving it up and down or side to side while pressing.  You can also make sure the higo connector between the controller and throtthe is securely plugged together, making sure not to rotate the connectors and insure  positive alignment of the pins.

If all those appear to be connected properly you can look inside the throttle ( top pops off) for anything  amiss like disconnected wires.

if all that checks out, you’ll need to trace the power from the battery cradle output wires to the controller with a multimeter.   Every electric bike owner needs one to check Circuits. You can use the probes to pierce the wires insulation to check for voltage. 

LEMMENO!

image.jpeg.460181aebee7ca43d0f0c2b7c7188c24.jpeg

     Reddy

 

 

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  • 1 year later...

I have a sondors , not sure what year or make. It’s a fat tire with no shocks in the front. It also didn’t have a display. I changed my controller and the battery shows no charge when powered up but full when shut off. Read that the control in particular had to have a lcd to work. Bought one. Still nothing. Throttle wires seem fine but I can’t get power to it to check it. When switched on the multimeter read nothing. When off, 50 something volts. Any suggestions?

Edited by Phil GarCIA
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Not true, where ever you read that. All Sondors Originals, the first few issues of Sondors Fat bikes, didn’t have LCD’s and to trouble shoot power problems, on all Sondors Fat Bikes you unplug the LCD if equipped and replace the shunt (cap) on the Higo connector that leads to the LCD, that was in place when all bikes are shipped new. If that cap is not installed that could be your problem. Those are avalable from Sondors.com (probably for free) or from Boltonebikes.com .

If you’re measuring 50V that’s not a 36V Sondors Canister Battery on the first few Sondors fat bike releases, but you probably have a 48V triangle Sondors Battery that will measure about 52V fully charged. That would make your bike a 3rd or 4th generation. The fact that you register 50V when off might indicate your using the rocker Switch backwards, are you sure your Controller and LCD are compatible? 
Does it have a 7 speed freewheel on the rear? 
LEMMENO

 

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 REDDY FORUM MODERATOR

 

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