Hi all
I'm a newbie here and this is my first post - so go easy!
I realise this thread finished over two years ago but I recently had the exact same problem onedog had way back in Nov 2019.
I bought the same golf buggy from a recycling shop ($20) with the idea of making an electric billy cart for my grandkids - which I did.
Went beautifully for 1 or 2 hours then suddenly took off. I had installed emergency switches on the bumper bar and on top of the seat so I could quickly stop it. The control knob made no difference - in fact didn't make any difference if it was plugged in or not. Whenever the battery was applied it was full throttle, without any control. Since the I've checked the plug-in speed unit and it appears to be working normally on testing - resistance varies with turning the knob. I then took the speed control unit apart. No obvious burns/blisters or anything abnormal looking. Since I had ordered a new speed controller I thought I had nothing to lose so took the top off the relay - all looked normal there too. I have only superficial electronic theory knowledge (but I'm very curious) so I have no idea what caused the failure. I hope the new controller will get the cart back in motion.
I'm a newbie here and this is my first post - so go easy!
I realise this thread finished over two years ago but I recently had the exact same problem onedog had way back in Nov 2019.
I bought the same golf buggy from a recycling shop ($20) with the idea of making an electric billy cart for my grandkids - which I did.
Went beautifully for 1 or 2 hours then suddenly took off. I had installed emergency switches on the bumper bar and on top of the seat so I could quickly stop it. The control knob made no difference - in fact didn't make any difference if it was plugged in or not. Whenever the battery was applied it was full throttle, without any control. Since the I've checked the plug-in speed unit and it appears to be working normally on testing - resistance varies with turning the knob. I then took the speed control unit apart. No obvious burns/blisters or anything abnormal looking. Since I had ordered a new speed controller I thought I had nothing to lose so took the top off the relay - all looked normal there too. I have only superficial electronic theory knowledge (but I'm very curious) so I have no idea what caused the failure. I hope the new controller will get the cart back in motion.
