BAMBAM Posted November 14, 2010 Report Share Posted November 14, 2010 hey guys. rather new to the forum, i read as much as possible but got my new alternator in today and want to make sure im doin it right. i have an 04 silverado supercrew cab, a dual alternator bracket from dc, and a stock alternator and a mechman 270 with a yellowtop starting under the hood and a xs d3100 in the cab. i just turned 18, this is my first truck, and first real time installing my own stuff. thr bracket and both alternators are installed as well as the belt. i was told the second alternator would be grounded by the bracket but i dont think it works that way. and i was told to run a negative wire from the mechman alternator to the negative post of the xs. but that just seems inefficient. can i just ground the alternator to the frame? or does it need to go to the back battery? any and all help is super appreciated. i am a quick learner and just need some pointers. thanks guys Link to comment Share on other sites More sharing options...
Guest Posted November 14, 2010 Report Share Posted November 14, 2010 if DC told you the alt will ground itself through the bracket (which is attached to the engine), then i would be inclined to believe them. they wont give you wrong information. Link to comment Share on other sites More sharing options...
BAMBAM Posted November 14, 2010 Author Report Share Posted November 14, 2010 it wasnt dc. i honestly didnt think about grounding the alternators and just bought the bracket on my own, saved up some more and then bought a mechman alternator. a local shop wanted to charge me $1750 for a dual alternator bracket, two 220 stinger alternators installed. i thought that was rediculous so i decided to learn myself. i was told by the shop that the alternators would be grounded by the bracket, but when i installed it, theres nothing coming out of the alternator. a friend checked the wires and says power is going to the alternator, but nothing is coming out. Link to comment Share on other sites More sharing options...
BAMBAM Posted November 14, 2010 Author Report Share Posted November 14, 2010 and someone else on here i was messaging from the mechman section said it needed its own ground because of the internal regulator. not sure what that is, but the alternator did come with two posts for wiring already setup. so im assuming...it does need two wires? Link to comment Share on other sites More sharing options...
Guest DC Power Kyle Posted November 14, 2010 Report Share Posted November 14, 2010 The alternator case it the actual grounding point of an alternator. If you dmm the Case with a negative lead and a positive lead on the positive you'll get voltage. Link to comment Share on other sites More sharing options...
BAMBAM Posted November 14, 2010 Author Report Share Posted November 14, 2010 The alternator case it the actual grounding point of an alternator. If you dmm the Case with a negative lead and a positive lead on the positive you'll get voltage. so you mean the alternator should actually be grounded then? im calling it a night, but will start work again on it tomorrow morning. thanks alot guys. im just trying to learn as much as possible Link to comment Share on other sites More sharing options...
Team_DC-Derrick Posted November 14, 2010 Report Share Posted November 14, 2010 when you bolt the alt up to the engine, thats the ground the big ass bolt that bolts to the engine the grounding point on the alt is that part.... you dont NEED to wire any ground part to it... its bolted to the GROUND spot on the engine The DC Integra 3 18s to 6 15 build log Team_DC-Derrick's Youtube Team DC Audio where theres a will theres a wall....... I just realized Steve has reach Voldemort status, over on JP's site he is the one who will not be named....."We dont speak his name over here, fearing it will destroy us" LOL not even in hush tones Link to comment Share on other sites More sharing options...
BAMBAM Posted November 14, 2010 Author Report Share Posted November 14, 2010 when you bolt the alt up to the engine, thats the ground the big ass bolt that bolts to the engine the grounding point on the alt is that part.... you dont NEED to wire any ground part to it... its bolted to the GROUND spot on the engine ok, but when i installed the alternator, its not bolted to the engine. its bolted to the bracket....or does the brackets bolt to the engine ground both alternators? Link to comment Share on other sites More sharing options...
BAMBAM Posted November 14, 2010 Author Report Share Posted November 14, 2010 also the alternator had two posts ready for wires...what are they both for? Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted November 14, 2010 Report Share Posted November 14, 2010 ok, but when i installed the alternator, its not bolted to the engine. its bolted to the bracket....or does the brackets bolt to the engine ground both alternators? Yes TEAM SOUNDQUBED -- TEAM SOUTH TEAM S.O.B. - Founder & Captain 3x Streetbeat World Record Holder 2017 MWSPL 1st place Mayhem & 4th Xtreme 4 2016 MWSPL 1st place Mayhem/2nd Adv 4/2nd Xtreme 4 2015 MWSPL 2nd place Mayhem & 4th Xtreme 4 2014 USACI 2nd place Streetbeat 5 - 162.6 db 2014 MWSPL 2nd place Xtreme 4 - 144.9 db 2013 USACI 1st place Streetbeat 4 - 161.9 db 2013 USACI 1st place Street Q+ - 162.8 db 2013 MWSPL 3rd Kaos2 & 4th Xtreme 4 2011 USACI 2nd place MOD 1001-2k - 160.0 db 2011 MWSPL 4th place: Adv3 - 157.8 db, Kaos2 - 150s db, Xtreme4 - 140s db 2010 ARSPL 1st place 501-750 - 160.3 db Arkansas loudest Best score to date 164.4 db - Termlab Outlaw Streetbeat 4 - 161.9 db Streetbeat 5 - 162.6 db MWSPL on Dash Legal door open (Music) - 162.5 db Sealed on dash Legal (Music) - 161.1 db - Termlab THE BLACK NASTY CURRENT BUILD & FAB The Black Nasty (6) 15 Rebuild Log 2012 (4) 15 Walled Sierra Build Log Evo X build log Facebook page The Black Nasty Link to comment Share on other sites More sharing options...
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