Wondering if someone can shed somelight please.

I have installed a new amp, front speakers and rear speakers.

All is working correctly - power cable 4 gauge(down one side of the car - the RCA's down the other.

When lights are off there is no interference, however when i switched my side lights or dipped lights a buzzing sound comes from the amp?

Any reason why turning the lights on would cause this??

Many Thanks

Mick

Where is the amp earthed?

I suspect your wiring will be suspect on your headunit.

Dos the sound come from the amp or speakers?

Do you get a whine from the speakers in increasing with the engine revs?

Have a read of my troubleshooting post in the ice FAQ, that may help.

I have earthed it using 4 gauge cable to the nut in which the rear bench seat is secured to Jame5.

Szkom, the only wiring coming from the head unit to the amp is the remote and this is working fine. With this carrying current, I am assuming to activate the amp when the HU is switched on, I did run this cable along the side of the car with the power cable!

I am pretty confident the sound is coming from the Amp itself as it is coming from that direction. and no interference is coming from the other speakers. And it is a constant sound that comes on even if the engine is off, just the lights oin.

When I do drive the pitch of the whione does not change.

???

Just need to amend the above post, I listened more closely to the sound and th main buzzing sound is coming from the speakers, only the rears which are connected to the amp.

and secondly their is a small whine even when the lights are off raises with the engine revs.

Am i safe in thinking the buzzing sound is due to polarity? and the whine is due to a bad earth??

Many thanks again

Mick

I had a whine which raised with the revs and a buzz with the lights on.

You've got a ground loop. Have a look at my post in the ice FAQ for how I cured it.

As above, bad earth sounds like the problem, try and keep the earth cable as short as possible and make sure you scrape the paint back to bare metal where the cable is earthed.