2012 Camry. Odd noise with headlights off.

[oldAlpine]

I bought a 2012 Camry that has a Pioneer head unit and wiring for a sub, but no sub was included. I put in a simple box with a basic JBL amp. Works fine except when the headlights are off but the marker lamps are on, and then I get a weird hum/buzz through the sub. It's loud enough to be heard over the engine noise.

I looked at the wiring, and it has power and ground wires all the way to the battery (fused). This happens when car is running or not, and I can only hear noise from the subs when it happens.

Any idea why this would happen?

Click to read more...

 

[Doxquzme Premium Member]

Disconnect the RCA's or hi-level input to the JBl amp. turn the system on, If the noise continues, it's a ground or noise issue with the amp.If it stops, you know it is coming from the signal up line somewhere.