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need help installing 370 amp mechman alt in my 2015 yukon


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im new to this forum and im looking for some help for my install

has anyone ever installed a mechman alt on a 2015 or newer yukon denali?

i put 1 in already and it went bad(loud humming noise) in about a week.

so i sent it out and mechman fixed it but the rep said i had it grounded wrong?

he said you ground the newer style trucks different???

right now i have 1 yellow top optima battery up front

luckily there was a empty spot for it and i still have the factory battery

i ran 0 gauge from the positive on the factory battery to the yellow top

then i grounded the optima battery to the frame

then i ran 0 gauge from the alt positive to factory battery and grounded the alt

to the factory battery with 0 gauge also

what am i doing wrong ???

i couldnt understand what the rep was saying about the grounding issue!

sorry if so confusing i tryd to explain it the best i can....

also would like to know how many batterys would someone run for my system?

looking to use xs batterys in the back .should i take out the factory batterys and yellow top optima?

if you think i should add somthing or somthing is wrong with my set up im all ears!!

pics coming soon!

i have.....

4 1000/1 slash v2 jl audio amps

2 600/6 jl audio amps

4 13.5 w7 jl audios

6 6*9 jl audios

4 6.5 jl audios

1 audio control LCQ-1 sound processor

factory head unit

Edited by roc585
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  • 2 months later...

I have a 2010 Tahoe with a 270 mechman.  I spoke with someone from mechman and he told me not to ground to the frame.  he said run my 0gauge ground from the alt ground stud through that sensor ring to my battery negative post and when I install my second xs d3400 on the driver side to run positive to positive and negative battery to negative battery so the pcm sees the current draw.  he also stated to run my amp grounds directly to my battery also not to the frame so the amps current draw is also read by the pcm. 

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33 minutes ago, hayabusaboi06 said:

I have a 2010 Tahoe with a 270 mechman.  I spoke with someone from mechman and he told me not to ground to the frame.  he said run my 0gauge ground from the alt ground stud through that sensor ring to my battery negative post and when I install my second xs d3400 on the driver side to run positive to positive and negative battery to negative battery so the pcm sees the current draw.  he also stated to run my amp grounds directly to my battery also not to the frame so the amps current draw is also read by the pcm. 

Correct

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