ratter Member 6,793 Member For: 18y 11m 18d Gender: Male Location: @ my laptop Posted 26/04/12 10:34 PM Share Posted 26/04/12 10:34 PM First thing that was taught to me when we did electrical at trade school, (well they did not mention ecu's as it was a little while ago), voltage spikes or surges can do damage to various electrical items. Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1227772 Share on other sites More sharing options...
nick d Donating Members 1,594 Member For: 14y 9m 29d Gender: Male Location: Melb Posted 26/04/12 10:38 PM Author Share Posted 26/04/12 10:38 PM I highly recomment the CTEK units to anyone. Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1227776 Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 15y 3m 27d Gender: Male Location: Christchurch, New Zealand Posted 27/04/12 01:32 AM Share Posted 27/04/12 01:32 AM Rattter is right, if you are using a crap charger there is every chance that it may ruin your ECU from a spike. But if you get a good charger/maintainer then leaving the terminals connected is not an issue. Only issue I have with my maintain is I cant connect throught the power source socket as without the key on you dont get a connection. Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1227829 Share on other sites More sharing options...
Pete A Member 442 Member For: 16y 5m 12d Gender: Male Location: Castle Hill NSW Posted 27/04/12 02:19 AM Share Posted 27/04/12 02:19 AM (edited) On 25/04/2012 at 10:39 AM, bionicxr6t05 said: If its factory ford alarm just turn the ignition on then disconnect the battery.... Wont hurt anythingSo what does disconnecting the battery (for any reason) do? Doesn't it reset all sorts of computer stuff in the car? I've got a good quality charger and have never boothered disconnecting a terminal. What changes when you remove a terminal? Edited 27/04/12 02:22 AM by Pete A Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1227853 Share on other sites More sharing options...
gregor Member 459 Member For: 16y 8m 24d Posted 28/04/12 04:28 AM Share Posted 28/04/12 04:28 AM ive got one of the projecta units mentioned above, I might go months without driving my rx7 (mostly track use) so it was a PITA having the battery die. Got a charger that is designed to be left on, has a float mode to keep the battery close enough to full charge without doing any damage. Cost me approx $70, well worth it. Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1228421 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 18d Gender: Male Posted 28/04/12 05:01 AM Share Posted 28/04/12 05:01 AM On 27/04/2012 at 2:19 AM, Pete A said: So what does disconnecting the battery (for any reason) do? Doesn't it reset all sorts of computer stuff in the car? I've got a good quality charger and have never boothered disconnecting a terminal. What changes when you remove a terminal?Yes it clears keep alive memory which holds adaptive idle strategies etc, it learns itself again with a short drive, good quality chargers are safER to use with the terminals connected but any surge through an electrical module risks damage to fragile circuits, capacitors etc , same reason you disconnect the battery when your welding on a car etc Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1228441 Share on other sites More sharing options...
Wenier Donating Members 1,736 Member For: 15y 3m 27d Gender: Male Location: Christchurch, New Zealand Posted 28/04/12 05:37 AM Share Posted 28/04/12 05:37 AM most welders simply put a surge protector on instead of disconnecting. Link to comment https://www.fordxr6turbo.com/forum/topic/79878-charging-battery-with-terminals-connected/page/3/#findComment-1228459 Share on other sites More sharing options...
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