Buggies Gone Wild Golf Cart Forum - View Single Post - 07 Precedent 4 12volt system big spark on battery post

Sergio · 12-10-2015, 08:35 AM

Assuming the entire pack is not connected backwards, I would try the light bulb first.

The light bulb will not light up, if You even see a glow, You have bigger problems.

A voltage converter input capacitors will charge in less than 2 seconds when using a 60w light bulb resistance (240Ω) in series with the last power cable.

If the spark You got is indeed caused by a voltage converter charging, then the capacitors got some charge out of it and You will be able to measure it on the disconnected cables.

The controller will never cause that spark since it already has a pre-charge resistor in series with its input capacitors.

12-10-2015, 08:35 AM	#5
Sergio Gone Wild Join Date: Sep 2012 Location: Charlotte, NC Posts: 9,329	Re: 07 Precedent 4 12volt system big spark on battery post Assuming the entire pack is not connected backwards, I would try the light bulb first. The light bulb will not light up, if You even see a glow, You have bigger problems. A voltage converter input capacitors will charge in less than 2 seconds when using a 60w light bulb resistance (240Ω) in series with the last power cable. If the spark You got is indeed caused by a voltage converter charging, then the capacitors got some charge out of it and You will be able to measure it on the disconnected cables. The controller will never cause that spark since it already has a pre-charge resistor in series with its input capacitors.