I recently installed a new system with new head unit amp and subs. I had it working good but with only one sub playing and having to manually disconnect the power from the battery. I fixed both of those problems but now the subs wont play when I start the car. they will play when the is turned on but wont play when the engine is running. Could someone please give me some suggestions?

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[]v[]ike

 

I had the same problem. When the engine is one, your HU gives off more power, If your HU has a separate volume for the subwoofers, try setting it to its minimum point. Then, when the engine is running, set it up little by little. This worked for me, hope it helps.

 

You've evidently made a mistake with your wiring somewhere. Go back and check and recheck everything.