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Hi all. Desperately trying to find a forum where I can get some help with an electric quad issue. Hoping this is the place. I have issues with the power on my kids 36v quad. It's been in the garage for a while and when I brought it out, it wouldn't work. Did a bit of electric testing a realised the barrel ignition needed replacing due to a connection issue. Apart from that the 3 batteries appear to be pushing out 36v, the motor turns under no load, the throttle seems to work, lights all working, forward and reverse working and the two speed setting ok. The issue is when there is any load on the bike, it doesn't move. I've checked the power cable going to the motor and it's got 36v. I have no idea if it could still be the batteries or the motor. Can anyone suggest some diagnostics I might be able to do, to find out which part is at fault?
 
Have you measured the voltage across the battery terminals when driven/under load (full throttle?) and not moving, and the voltage across the motor under the same conditions? Are they both about the same, and if so how many volts? This is assuming the motor actually rotates if you can get to turn the armature.
 
If it's been stood for a long time with the batteries not connected to a charger/conditioner they will probably be no good. Especially if it's a lead acid type, which this sort of thing normally is. Lead acid batteries do not like being stored in a discharged state.

As above, measure the battery voltage when it is under load. You will probably find it collapses.
 
Hi, I don’t know if anybody can help. My sons electric quad doesn’t run off the throttle. Turn the key and put it in forward and the it just goes full power, no control with the throttle. It was working fine until I changed the 25amp fuse for a 30amp due to it been burnt out.
Does anybody have a solution?
 

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