Need Help (and lots of it)

[emptystrings]

First time installer, and I probably did a lot of things wrong.

Okay, yesterday I installed an Alpine MRV-F340 in the trunk and some new Kenwood Excelon X699C, I think (whatever their 6x8 speakers is). I use the David Navone N774 for my LOC. Everything's working, except I get bad hissing, but I live with it for one day.

Today, I checked the ground, resanded, and it's made sure that I had a good ground. Still get noise. I disconnect the RCAs to check to see if it's the amp or something else. No noise once the RCAs are disconnected, so it must be something else. I go back, take the head unit out (stock) and wrap the RCA connections up front as people have suggested on the board. Reconnect everything, turn it on, and I still get hissing.

Then, the head unit goes on and off intermittently and then finally dies and won't turn on anymore.

If you have any ideas on either my noise issues or why my headunit just died, I'd appreciate any thoughts. Should I consider my head unit gone? I'm not sure anybody could have done worse than me. Please help. Thanks.

Daniel.

 

[Poseur]

Perhaps you should try re-grounding your HU??? sounds like you've got something goingon upthere... how about when you disconnect the rcas form the LOC?

 

[emptystrings]

Okay, HU is fixed - bad crimp for the remote and the splice actually cut the wire instead of just crimping it in place. Stupid mistake.

Where is the factory gnd for the HU? I'm figured since I'm using my stock unit, I could just use factory ground. If you know where it ground to, I'll check it out.

It's quiet when I disconnect the RCAs from the LOC.

 

[emptystrings]

Can anybody tell me, really quick, where the factory HU is grounded to? I can't find it's location, and I'd prefer to take the stock wire out before I try to re-ground the HU. Thanks.

 

[Poseur]

It's somewhere in that center pillar behnid that hvac controls I believe. I swear I've seen it a time or 2 ad I also swear I thougth it looked a bit weak.

 

[emptystrings]

Thanks.

 

[sndsgood]

anytime you put in an aftermarket headunit i suggest using your own ground and not the stock grounding point.

 

[emptystrings]

Actually, I'm using the stock HU. I'm just trying to figure out how to get rid of the hiss I'm getting. I cut into the factory wires for my install, so the ground is automatically at the stock location via harness. Maybe I should just ask, what is the best way to rewire the stock HU ground?

 

[sndsgood]

oh didnt realise you still had the stock ground in.

 

[Astral]

Actually, I'm using the stock HU. I'm just trying to figure out how to get rid of the hiss I'm getting. I cut into the factory wires for my install, so the ground is automatically at the stock location via harness. Maybe I should just ask, what is the best way to rewire the stock HU ground?

Strange, I'm using a David Navone N-774 unit (non-variable 4-channel LOC). My LOC is right behind the HU. I run RCAs all the way to the back. I don't get much hissing (some, but nothing to bother me, and not really audible the while car is moving, esp. at 30+mph).

Instead of disconnecting RCAs, attempt making a muted RCA plug, see the bottom of http://www.davidnavone.com/ page for instructions. This will 100% rule out noise from your amp beyond. I'm skeptical that you have noise in your amp line anyway, so this will probably not help.

is this hissing or is it more like alternator whine? can you hear a whine (that appears to follow the RPMs) when you rev the engine?