Amp/Headunit Problems

Hi, I've installed a subwoofer in my car with an amp, the wiring was already there (power, earth, amp wires and remote) and I have got it all connected ok.

My headunit has started acting strange, it constantly flickers on and off, even with the ignition switched all the way off. When the car is running it flickers quicker and there is rapid pulse beat from the sub (which I assume is from it constantly loosing and regaining power), none of the buttons respond and it won't come on long enough for me to do anything.

It did stop doing it for aprox 30 mins untill I turned up the volume to near max to test it and it has been doing it constantly since (I've disconnected the headunit overnight).

I have tried resetting the headunit and triple checked all of the connections.

Before I had a sub/amp the headunit used to do this very occasionally when the volume was turned very high, it always turned back on long enough for me to quickly turn the volume down and then it was back to normal.

I have tried a friends headunit aswell and it does exactly the same so I know it's not my headunit. The headunit is JVC if that helps?

Any help or advice will be greatly apprieciated.

Cheers, Ed.

P.S. I have attempted becoming a member so I could post this in the ICE forum but I was told that there's a problem with Paypal atm and no one can join untill it's sorted.
 
sounds ominously like an earthing issue

was going to add about the pulsing from the alternator, but if it doing it when the power off.

but certainly sounds like when you have cranked it up you have shorted something, it wont necessarily knock it off, especially if there is still some sort of connection but it may have just reduced the earthing core.

check the earths at the back of the head unit.

you may want to double earth the amp and the HU, or make better connections

whats your fusing like - if at all you have fused the amp etc

wayne
 
sounds similar to mine, in the end i found out that it were the black ariel wire shaking and losing the connection!
 
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