I have a 2005 International School Bus it use to have maintenance free batteries in it and never had any troubles with them. Now it has new 8D30
not maintenance free batteries in it that was put in a month ago and now they are already dead. The bus has been sitting not been driven. But the batteries are completly dead. Turns out the batteries were good, and the bus must have a draw somewhere. I looked around nothing was left on. Im not to sure the best way to find a draw, I disconected the negative terminals on both batteies, left the positive connected on both batteries, connected my test light to the bus Frame, and touched the test light to the negative terminal and it lite up strong. am i checking this correctly? Do you know a better way of checking for a draw, im stumped and cant seem to find where this draw is coming from, any advise is greatly appreciated.