YukonDCXL Posted February 22, 2014 Report Share Posted February 22, 2014 Hey guys, Just wanted to see if any of you all have this problem or if this is normal. I have an 07 Yukon with a Ohio Gen 275amp alt. big 3 done with 1/0awg, interstate under the hood and 3 dekas in back. When I start the car I am at 14.9 volts and after driving for a few minutes this will some times drop to 12.5 volts. If I have my system going pretty much from start time and driving it usually does not drop, but when I am driving with no system, no AC it will drop to 12.5 and If I turn system on it usually does not come up. any thoughts? Link to comment Share on other sites More sharing options...
Rich Schenk Posted February 22, 2014 Report Share Posted February 22, 2014 how many runs of 1/0 do you have to the back. did you ground to the frame, and what equipment are you running? On 3/28/2014 at 4:22 PM, KyLar96 said: Its all about the music anyway..... Do a proper install, something your happy with, Fuck everyone else...... improve in time, where you can..... its not rocket science... Tiburon build //www.stevemeadedesigns.com/board/topic/174059-97-hyundai-tiburon-build-from-ramming-to-slamming-slow-5k-build/ 2000 Mountaineer build http://www.stevemeadedesigns.com/board/topic/186736-2000-mountaineer-build-from-ramming-to-slamming-part-iislow-5k-builddc-audio-americanbassxspowersingerarcaudiostingershcavideo-on-pg7/ 2000 Mercury Mountaineer: Electrical:Singer 360 hairpin powdercoated white alt, Big 4 double run 1/0 SHCA OFC, 4 runs 1/0 OFC SHCA, limitless 70ah, HU: Pioneer deh80prs interiors: Skar sk85.4 on sb acoustics neo dome tweeters 2 Mmats sq4100s on 4 silver flute 8s(4ohm) SUB Stage: 3 DC5K [email protected] on 6 ascendant audio mayhem 12s d1.4s fully loaded Link to comment Share on other sites More sharing options...
dangaranga Posted February 22, 2014 Report Share Posted February 22, 2014 I believe that the alt is pcm controlled in your vehicle, and it shuts off when under certain conditions. I believe you can trick it into staying in charge mode by manually turning on the head lights or turning on tow haul mode. Brandon 2000 Furd Ranger supercab 4x4 System: welding wire throughout the truck USalts 390amp Hairpin Juicebox in stock location 8 Banks of maxwell supercaps 2 American Bass Vfl 1100.1 wired to .35 each 2 Fi Audio Sp4 18's ( the DD sc 9918's smoked) Pioneer radio with Soundstream PA mids Powered by a nice sized soundstream 2 channel It's pronounced (dain-ja rain-ja) 2001 2 door focus 1 DD9918 SC Link to comment Share on other sites More sharing options...
Karkov Posted February 22, 2014 Report Share Posted February 22, 2014 You have the ground sensor don't you? How did you do your big 3? lol 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...
YukonDCXL Posted February 22, 2014 Author Report Share Posted February 22, 2014 From back batteries I ran 1/0awg ground up to front battery. For my big 3 I did run my 1/0awg ground through the circle sensor thing with the factory little wire that ran along side the factory ground. But anyways ran ground from battery to block and from engine block to frame and of course 0g from alt. to to battery. Link to comment Share on other sites More sharing options...
YukonDCXL Posted February 22, 2014 Author Report Share Posted February 22, 2014 I believe that the alt is pcm controlled in your vehicle, and it shuts off when under certain conditions. I believe you can trick it into staying in charge mode by manually turning on the head lights or turning on tow haul mode. I believe this is the problem because it did this before I ever had a system. My headlights are automatically always on. Link to comment Share on other sites More sharing options...
get_us Posted February 22, 2014 Report Share Posted February 22, 2014 Yes that is PCM controlled. That is why I went with a dual alt kit and have a separate charging system for my system on my 2011 Tahoe. I believe that 2007 and up are PCM controlled. Link to comment Share on other sites More sharing options...
YukonDCXL Posted February 22, 2014 Author Report Share Posted February 22, 2014 You have the ground sensor don't you? How did you do your big 3? lol Does your tahoe not do this? Link to comment Share on other sites More sharing options...
YukonDCXL Posted February 22, 2014 Author Report Share Posted February 22, 2014 Yes that is PCM controlled. That is why I went with a dual alt kit and have a separate charging system for my system on my 2011 Tahoe. I believe that 2007 and up are PCM controlled. So I have to have two alternators to fix this? Link to comment Share on other sites More sharing options...
Karkov Posted February 22, 2014 Report Share Posted February 22, 2014 From back batteries I ran 1/0awg ground up to front battery. For my big 3 I did run my 1/0awg ground through the circle sensor thing with the factory little wire that ran along side the factory ground. But anyways ran ground from battery to block and from engine block to frame and of course 0g from alt. to to battery. You can do the normal big 3 and add as many grounds as you want if you don't go through that sensor, OR you can go through that sensor and add NO grounds. Basically run a negative from alt, to front battery (through the sensor) then from front battery to rear battery(s) and ground amps to the rear batteries. No extra grounds if you go through the sensor. Otherwise your voltage will fluctuate. Personally I recommended adding all kinds of grounds like normal and not going through the sensor. For more info on this ask DC Power Kyle. 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...
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