Head unit install problems - hissing sound

[tngisaga]

Hey guys. I just installed a Pioneer DEH-P7000BT in my car. I thought the installation had gone successful because there was no noise or hissing at all when I was testing out the system. Well, this all quickly changed after I started the engine. The noise gets louder when I push the gas pedal.

I don't know what could be wrong. I don't think I blew the fuse in head unit because I disconnected the battery prior to working. Besides, there was no noise coming from the head unit when the engine was off. My wiring seems correct; however, I did choose to ground the black wire to the wiring harness in my car. The instructions says that I should hook it up to a metal part of the car. Do you think it's this or possibly something else?

(I recently had another Pioneer HU but bought another one since i blew the micro fuse in it, so I know what it sounds like. It had noise when the engine was off and on. This time I was very careful.)

Oh yeah, I'm installing this in a '02 civic coupe.

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[Fusion_FREAK 10+ year member]

Check your grounds.

 

[Goindef154 5,000+ posts]

x2 that's probably what it is.

 

[tngisaga]

Actually, the head unit is starting to hiss while the engine is off too. There's hissing when I increase the volume and when it gets to 0, there's a pop sound. I think I'm going to check it again later because I tested after driving for two hours. Maybe ripples from the alternator still there? I don't know, but I hope it's not that infamous micro-fuse issue again. This sucks because I just bought the thing from Best Buy yesterday. You think they'll let me exchange it for a new one?

Anyway, I will go ahead and check everything later today. Thanks guys.