hbr509 Posted February 2 Share Posted February 2 I would like to change batteries both house and chassis . Is there a master cutoff switch somewhere or do you use the salesman switch . Link to comment Share on other sites More sharing options...
Dwight Lindsey Posted February 2 Share Posted February 2 You should have battery shutoff switches in the battery bay, one for house and one for Chassis. Those are the ones you need to shut off. Link to comment Share on other sites More sharing options...
DavidL Posted February 2 Share Posted February 2 (edited) I would turn everything off that you are aware of. Then in the battery bay there MAYBE a master cutoff switch. Or a big fuse. Disconnect or turn off the switch (if exists). Take pictures of what cable goes on which terminals (important!) Label them too! Loosen the positive cable connector trying not to jiggle or remove the cable yet (no arcing, no voltage changes - if no master switch or fuse was turned off / disconnected). Make sure you don't short your wrench to another battery post or ground! Pull the Positive cable off the battery closest to the wiring harness that connects the batteries to the RV in one clean movement. Pull the Negative off the ground cable. Remove rest of battery interconnects. Remove batteries. Edited February 2 by DavidL 1 Link to comment Share on other sites More sharing options...
Ivan K Posted February 2 Share Posted February 2 Even with the kill switch off, there might be some direct connection, like your solar or even ECM. I always disconnect ground cable first to prevent accidental shorts to ground. 1 Link to comment Share on other sites More sharing options...
granvillebarker Posted February 2 Share Posted February 2 When messing with batteries I always disconnect grounds first, if the wrench hits bare metal, you shouldn't have a short that way. You can also wrap your wrench in electrical tape or heat shrink to help avoid shorting anything. That's a trick for tight spaces mainly, where you have to take the positive off first. Good luck and lift with your legs. not your back! 2 Link to comment Share on other sites More sharing options...
hbr509 Posted February 2 Author Share Posted February 2 Thanks for help I will look and see about cutoff switches , and I always take pics of wiring ,to many and my memory is not as it once was Lol Link to comment Share on other sites More sharing options...
Scott 61 Posted February 2 Share Posted February 2 I would unplug the coach and turn your inverter off Link to comment Share on other sites More sharing options...
cbr046 Posted February 2 Share Posted February 2 All good points. And just a reminder . . . the + cable from chassis battery to starter is always live, no matter the position of the cutoff switch. This makes removing - cables first another good idea. And this is the time to clean out the battery bay from all that corrosive "dust". - bob Link to comment Share on other sites More sharing options...
Steven P Posted February 5 Share Posted February 5 When I did mine, I removed all rust and repainted before putting back. Link to comment Share on other sites More sharing options...
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