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post #1 of 16 (permalink) Old 02-10-2014, 06:53 PM Thread Starter
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Help with main ground wire.

I'm installing my J&M Rokkers system. Everything going smooth until I got to the main ground for the amp. Instructions say NOT to go to neg post on battery, yet I have seen people do it even professional installers on YouTube. Only reason I ask I the main ground screw on the motor is pissing me off!!! I can't get to it. Is there a special tool I need?

I have a 2013 FLTRU

Thanks...

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post #2 of 16 (permalink) Old 02-10-2014, 06:58 PM
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I'm not sure about where the spot you're referring to, but the spot where I've ground my systems to is on the right hand side of the bike just forward and below the battery. If you want, I can take a picture of it and upload it. I forgot who told me about that spot, but i've used it on all my amps and it works like a charm. I cant remember what else is grounded there.
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post #3 of 16 (permalink) Old 02-10-2014, 07:06 PM Thread Starter
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Would appreciate a pic. The main ground on the bike is behind the oils dipstick. Can't get any tools back there to get it. Some guys on the other HD forums said I could get background noise off the frame???

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post #4 of 16 (permalink) Old 02-10-2014, 07:10 PM
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Originally Posted by cruznmarine View Post
Would appreciate a pic. The main ground on the bike is behind the oils dipstick. Can't get any tools back there to get it. Some guys on the other HD forums said I could get background noise off the frame???

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https://www.roadglide.org/showthread.php?t=116634 This guy FFR says he grounded to the fairing mounting bracket with out fail.

2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.
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post #5 of 16 (permalink) Old 02-10-2014, 07:16 PM Thread Starter
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Why are their so many opinions on whether or not to go directly to battery? Some companies say to, and others say never??? Is there some evidence either way of damage, or just personal beliefs/opinions?

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post #6 of 16 (permalink) Old 02-10-2014, 07:24 PM
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Why are their so many opinions on whether or not to go directly to battery? Some companies say to, and others say never??? Is there some evidence either way of damage, or just personal beliefs/opinions?

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Good question. I was wondering the same. I always thought there was no better ground than the battery.

2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
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post #7 of 16 (permalink) Old 02-10-2014, 07:26 PM Thread Starter
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Good question. I was wondering the same. I always thought there was no better ground than the battery.
So confusing if your not specialized. I always thought it was ok unless your stacking it up.

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post #8 of 16 (permalink) Old 02-10-2014, 07:37 PM
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Here is a good (short) explanation of a ground loop which may shed some light on the issue with noise caused from an improper ground.

http://www.carsdirect.com/aftermarke...-amps-overheat


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post #9 of 16 (permalink) Old 02-10-2014, 08:22 PM
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I don't buy the instruction that you have to ground the amp to the frame ground point rather than the battery. Those two points are on either end of a thick, short cable. Electrically, they're the same point.

I ground everything to a terminal block connected to the negative battery terminal and have had no problems.

On my last two bikes I've used a Powerlet Termin-8 to make all my positive and ground connections. It's convenient and maintains a single, clean connection to each battery terminal. Works great: http://www.powerlet.com/product/term...-fuseblock/409


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post #10 of 16 (permalink) Old 02-10-2014, 10:07 PM Thread Starter
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Sweet JayKS. Think that's what I will do.

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