FiTech EFI Tuning Forum MenuForum NavigationForumMembersActivityLoginRegisterForum breadcrumbs - You are here:ForumElectrical: Wiring requirementsdisconnecting batteryPlease Login or Register to create posts and topics.disconnecting batteryphil302@phil3029 PostsMembers#1 · February 24, 2019, 7:09 pmQuote from phil302 on February 24, 2019, 7:09 pmdoes disconnecting the battery for a long period or using a battery isolator switch affect the fitech unit does disconnecting the battery for a long period or using a battery isolator switch affect the fitech unit Deleted user#2 · February 24, 2019, 8:25 pmQuote from Deleted user on February 24, 2019, 8:25 pmI have had mine unhooked for over a month. Didn't have an issue. To be safe, save your tune just in case. I have had mine unhooked for over a month. Didn't have an issue. To be safe, save your tune just in case. Post Reply: disconnecting battery Cancel