Question about Jl Audio 500/1 Car Audio Amplifier

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Jl; audio 500 amp

Hooked up new stereo and now amp wont stay on

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  • reujota Apr 16, 2008

    i just put a new stereo in my truck, hooked everything everything up and turned it on to adjust the settings on the amp, and it didn't come on. i started messing around with the settings and when i touched the signal sensing switch it turned on for a while and then turned of again. the amp doesn't turn on when i start the truck and when i do get it on it turns off after awhile. the amp is not getting hot and i have already checked all the wiring and connections. i think the problem may be in the signal sensing switch but i don't know what do i do?

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I assume the signal sensing switch you are talking about is the remote turn on for the amp. The amp should turn on when you turn your radio on, not your truck.
First try disconnecting the remote turn on that comes from your radio. After that is removed turn your radio on and them run a jumper wire from the positive voltage terminal of the amp ( the main power input) to the remote turn on terminal of the amp. If the amp turns on and you hear music, you have a problem with the remote turn on from the radio. If the amp turns on but you hear no music you have a problem with the audio input of the amp or the wiring of the speakers. if the amp does not turn on you have a problem with the amp.
I think you may have a problem with the remote turn on output of your radio. if so, you need to get the radio looked at by a service technician.
If the amp is turning on sometimes, you may just have a loose wire or faulty ground. Double check all the wiring.

Posted on Jun 16, 2008

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1 Answer

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Also your LPF filter could be set too high.

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