CrewcabBass918 Posted June 16, 2016 Report Share Posted June 16, 2016 I have an 08 sierra with dual batts under hood. With new amp (sundown scv2000) im getting voltage drop especially turned up at idle, sitting still at stop light. Both batts under hood are Duracell 65ah each wirred in parrel. With a mechman ho 270. Im not sure if i should replace those with xs power d3400s or add a xp3000 to the rear. Which do yo reccomend and why? Thanks guys! Quote Link to comment Share on other sites More sharing options...
boom50cal Posted June 16, 2016 Report Share Posted June 16, 2016 Do you already have your big 3 done? A dumb question to ask if you already have dual batts and a ho alt, but sometimes people wont, and you may have a dmax truck idk. I would add an XP3000 in the rear. Nothing wrong with those Duracell's if they are AGM's. Once they crap out, ya a pair of D3400's. With just a single scv-2k, and assuming a 4 channel, 3 batteries will be overkill with an AGM but it's always good to be overbuilt. Do you have a single run of 1/0 to the amp(s)? Quote On 1/4/2013 at 9:31 PM, HatersGonnaHate said: Wow. 184 posts and I think you're a fucking asshole. Link to comment Share on other sites More sharing options...
ToNasty Posted June 16, 2016 Report Share Posted June 16, 2016 You cant technically do the big 3 woth 05-up. Try playing the system with your headlights turned on. I know it sounds dumb but try that Quote ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
ericholmes408 Posted June 16, 2016 Report Share Posted June 16, 2016 have a load test done on those batteries. sounds like one of them might be toast. Quote Link to comment Share on other sites More sharing options...
CrewcabBass918 Posted June 16, 2016 Author Report Share Posted June 16, 2016 I dont believe they are agm just good ole basic lead acid i believe. No diesel its a 1/2 ton. But the 07-13 has a voltage sensor so you are not supposed to do big 3 as the ecu monitors alt output through that sensor and adjust as needed for economy. Dumb imo! This is per mechman. However when the alt was installed per there i structions it would not charge properly so i put the factory ground to frame and mktor back with upgraded 2/0 from alt to batt. That fixed that issue but i plan to upgrade those factory grounds so basically perform big 3. Its a mess of an explanation. Yes 1 run of 2/0 to rear for sub amp and one run of 4gauge for 4 channel however i want to do a 2nd run of 2/0 if i do xp3000 in rear and the dual off that to the bass amp. Quote Link to comment Share on other sites More sharing options...
CrewcabBass918 Posted June 16, 2016 Author Report Share Posted June 16, 2016 Tonasty U know the complicated mess that is upgrading electrical on this truck! Thanks for chiming in. Ill try the headlight trick. Good call on the load test, those batts arnt spring chickens so o could have a bad one and this new bigger amp is making it show its self. Quote Link to comment Share on other sites More sharing options...
ToNasty Posted June 16, 2016 Report Share Posted June 16, 2016 I do know these bullshit pcm things. If that doesn't work. Upgrade the 2 underwood batteries with what I prefer which is xs. You should be good Quote ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
Karkov Posted June 25, 2016 Report Share Posted June 25, 2016 AGM are still lead acid. 07+ might have the sensor but 05+ are PCM controlled, or vice versa...i forget I messed around with exactly what you are now and my voltage would be fine for a while then it would go way low, then high again, it was weird, until I did exactly what Mechman had said it stayed fluctuating. I now just run 2 separate charging systems and don't deal with it by leaving the factory charging system alone. Quote 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.