ToNasty Posted February 2, 2016 Report Share Posted February 2, 2016 It's because you have a battery current sensor. As long as your big 3 ground is ran through the sensor, you're fine. If you add any other grounds (on the stock charging system) and they are not ran through the sensor, you will eventually get a high charge This is why I'm doing a separate charging system on my 07 silverado classic ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
Ahmed Johnson Posted February 2, 2016 Report Share Posted February 2, 2016 OP, from my understanding, there is a current sensor on the factory ground wire for your battery, and any additional grounds to the battery must be run through that. The problem with that is, that sensor is too small to add any wire that would be suitable for the big three. So the only option is to either not do the big three, or to run a dual alt setup, with your high output as a charging system ONLY for a rear battery bank/amplifiers, completely separate from the main charging/starting system, otherwise your new alt will charge higher than it should be. As for grounding your amps and rear batteries to the frame, that should be fine, just not to the front battery. If my information is off, I'm sure ToNasty will be here soon to correct it as all of his posts about the current sensors are what I'm trying to remember without searching the forum for it. Edit: here you go OP. Maybe this will help. ToNasty explains it easier than I do. Since I don't have it. http://www.stevemeadedesigns.com/board/topic/198746-tahoe-battery-current-sensor/ It's because you have a battery current sensor. As long as your big 3 ground is ran through the sensor, you're fine. If you add any other grounds (on the stock charging system) and they are not ran through the sensor, you will eventually get a high charge This is why I'm doing a separate charging system on my 07 silverado classic Does this only affect 05 and up? I don't have that type of problem in my 04 at all. Link to comment Share on other sites More sharing options...
ToNasty Posted February 2, 2016 Report Share Posted February 2, 2016 05 and up trucks. And I think suv started in 04 but I'm not sure. Just check and see if you have the sensor ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
Ahmed Johnson Posted February 2, 2016 Report Share Posted February 2, 2016 I know in the 08 Trailblazer I had, if you did a ground from the battery to the alternator it would act crazy. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The ALT is already grounded on the engine and the engine is either grounded to the frame or has a ground wire going to the battery so that being said when u grounded the alt to the battery i ASSUMED YOU ADDED an extra ground wire For some reason the Trailblazer charged at 13.8 but the tahoe is at 14.4 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I never said 13.8 was bad i was just saying that 13.8-14.4 was acceptable as a charging voltage nothing else i didnt mean to get anyone upset, hope you get ur alt and big three wired up It's shit like this why I like dealing with people with real world experience. No you, didn't upset me and you still obviously haven't read my post. My big 3 is wired up on the current.......... Nevermind. Link to comment Share on other sites More sharing options...
Ahmed Johnson Posted February 2, 2016 Report Share Posted February 2, 2016 05 and up trucks. And I think suv started in 04 but I'm not sure. Just check and see if you have the sensor Naw I don't, thank god. Shit drove me crazy with my TB Link to comment Share on other sites More sharing options...
ToNasty Posted February 2, 2016 Report Share Posted February 2, 2016 05 and up trucks. And I think suv started in 04 but I'm not sure. Just check and see if you have the sensorNaw I don't, thank god. Shit drove me crazy with my TB Least you down wit da trap cuh ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
Bump4life Posted February 2, 2016 Report Share Posted February 2, 2016 I was going to jump in and help but it looks like the answer has already been give . The current sensor is the limiter here in the 05 and up pcm gm Systems Buyer/Seller Feedback Thread: http://www.stevemead...5015-bump4life/ MB C220 153 Trunk Car Build Log: http://www.stevemead...d/#entry1840136 MB C280 Ipad Dash SQ Build Log: http://www.stevemeadedesigns.com/board/topic/194484-bump4lifes-new-benz-tony-c-relay-kit-pictures-ce-electric-audison-front-stage-installed/ My SPL Log: http://www.stevemead...__fromsearch__1 BMW M340 xDrive Stock, for now. Corner Load 10" maybe soon. But does 10s in the 1/4... Best Scores out of a trunk 153.0 sealed legal full tilt clamped 5524 @ 42 hz 154+ windows down, 155+ kick Link to comment Share on other sites More sharing options...
zack_e89 Posted February 2, 2016 Report Share Posted February 2, 2016 OP can we still see the paper? 97 Suburban 8 custom PSI Platform 3 18's Link to comment Share on other sites More sharing options...
BallinLikeANutsack Posted February 3, 2016 Author Report Share Posted February 3, 2016 Thanks for the help everyone i guess its time for dual alt bracket. Please excuse the massive picture. Link to comment Share on other sites More sharing options...
ToNasty Posted February 3, 2016 Report Share Posted February 3, 2016 Slip the new ground wire through the sensor (itl be tight) and connect to alt bolt ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
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