2 problems...

[log123]

ok so ive got two problems but i think that they are probably from the same source. i just dont know what that source is... first off i have 4 infinity 6x9s ran by a profile amp and a kenwood excelon HU. oh and i just bought and installed the kenwood HU but had the same problems when my ancient pioneer HU was in there.

ok when the radio kicks on i get a thump through the speakers. it happens when i do other things too, like change tracks on a cd etc. i have tried grounding the HU in a different place and i tried grounding the amp in a different place. neither worked. i even tried running the constant and switchable power wires to different places. that didnt help either. i have junk rca cables right now i dont know if that matters at all though. thats the first problem

the second problem is whenever i hit the breaks, turn on my headlights, hit the bright lights, basically when i do anything with any electrical stuff in the car. the stereo cuts out for a split second and its getting really annoying. sometimes ill be sitting completely stopped at a stoplight and the radio will be playing fine and then cut out for a second.

any help at all would be greatly appreciated. thanks!

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[log123]

anybody?????

 

[amedeuce 10+ year member]

Not that is matters but what's the vehicle?

 

[Rich B 5,000+ posts]

Are you using a power wire off the fuse box to power the HU?

 

[kross 10+ year member]

Sounds like a bad power or ground connection somewhere.

Also, have you seen this other thread with the same problem?

http://www.caraudio.com/forum/showthread.php?t=252241

 

[log123]

its a 97 z24 cavalier

the only wire i have to my fuse box is the turn on wire for the amp. i have changed it to a different place before and that didnt help either.

 

[log123]

oh and im using a wiring harness that connects the HU to the factory radio wiring. ive tried getting rid of the harness and hardwiring everything but that didnt work either.

and how exactly do you ground rca cables to your HU chassis?

 

[log123]

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[JLJunkieMX107 10+ year member]

Junk RCA cables could be the cause.

 

[JLJunkieMX107 10+ year member]

Read up on this and it may help you. http://www.bcae1.com/glisoltr.htm

 

[log123]

im using two preouts off the HU right now. a front and a rear and ive got ground loop isolaters on both of them...didnt help either i forgot to tell you guys that. ive been planning to get new rcas neways so ill do that sometime and if that doesnt help ill tell ya.

just for future reference is there a way to ground rcas to the HU? i believe someone noted that above somewhere or in another post. ive never heard of that before and thought it may be a good idea.

thanks for the help guys.

 

[log123]

nevermind about the rca grounding thing. i found the thread with it in it, like the thread that covers about all the "noise" issues that i didnt see before. my bad.

 

[userdel 10+ year member]

yea replacing the rca's should do it, i've had the same problem in the past, and that worked for me.