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Unread 09-03-2013, 11:41 AM   #1
WJ_allday04
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Dirty power going to my amp?

so I upgrade my sound system about 2 yrs ago, a cheap boss headunit then subs and I never had a problem. so 2 months aho I decided to overhaul the setup and install better components. I install a mtx amp with my cheap headunit and syill no problems. I then installed a new kenwood k255u headunit and the sound improved x100 and I didn't have any problems until last month. when ever any lights are turned on inside the wj, I hear a sound according to the light. turn on the dome lights, a little bump in the subs. turn off, same thing. when I close the door when the jeep is on, it sounds like a time wrap from a cartoon as the lights dim. the ground for the amp is perfect, the rca cable is clear of the power wire for the amp and all the connections for the amp are fine, I'm outa ideas so any insight would be greatly appreciated.

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2004 WJ 4.7 - 4in lift
RC springs shocks//IRO UCA's+LCA's
JKS trackbar//KOR bushings//Moog trailboss SS
24" light bar//x2 3" duallys//JK steelies//31's

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Unread 09-03-2013, 12:30 PM   #2
wjidaho
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Mine did the same come to find out it was my ground on the deck it came lose from the wire harness when I did the deck swap, start their then you RCAs and ground for your amp
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Unread 09-03-2013, 02:48 PM   #3
thechainrule
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The ground that is in that stock wiring harness is garbage, run a separate ground from the back of the harness on the HU to the chassis.
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Unread 09-04-2013, 05:50 AM   #4
WJ_allday04
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that's for the input. I work with a guy that did car stereo installation for 15yrs and he said the same thing, I wanted the wj owner input too haha.
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2004 WJ 4.7 - 4in lift
RC springs shocks//IRO UCA's+LCA's
JKS trackbar//KOR bushings//Moog trailboss SS
24" light bar//x2 3" duallys//JK steelies//31's

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Unread 09-04-2013, 11:25 AM   #5
wjidaho
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Yeah these wjs are ground sensitive rigs, when ever I have any problems with it I always check and recheck my grounds then move from their, my ground on my deck even messed with my Cruz control.
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Unread 09-08-2013, 06:23 PM   #6
WJ_allday04
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I tried moving the ground and it help a lot but the sound is still there just 70 percent quieter
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2004 WJ 4.7 - 4in lift
RC springs shocks//IRO UCA's+LCA's
JKS trackbar//KOR bushings//Moog trailboss SS
24" light bar//x2 3" duallys//JK steelies//31's

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Unread 09-08-2013, 07:59 PM   #7
HeavyArms
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Have you added any grounds under the hood? I had the same problem with mine untill i upgraded a few grounds to 4 amd 2 gauge.

Also im not sure how other people feel about this one but i believe in also running a independent ground. I have 4 gauge power and a small 8 gauge ground for my sax-1200.
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Unread 09-08-2013, 09:06 PM   #8
WJ_allday04
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no i haven't added any. I did rewire my wire harness for my head unit and that helped a little too. I'm really stumped at this point . Like i said in the 1st post, this started a month after i installed my new head unit. I already found that my old ipod cable i was using was back feeding and immediately replaced that. This may be a dumb question but could a pinch in the power wire for the amp cause this issue???
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2004 WJ 4.7 - 4in lift
RC springs shocks//IRO UCA's+LCA's
JKS trackbar//KOR bushings//Moog trailboss SS
24" light bar//x2 3" duallys//JK steelies//31's

My Build Thread
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