Car Stereos: 01 grand cherokee radio question, amp power, grand cherokee

Question
hello justin good day,

here is the scenario, months ago i wanted to upgrade the HU in my GC but couldnt becuase of the PCI Bus cable on the back of the stock HU. forward to now. i have added an amp and subs to my stock HU (havent heard them sound yet) my question, i bought a lineout converter and installed it in my jeep, now i assume everything is correctly wired up (to the rear speakers). but i dont have any sound coming to the subs. there is power to the amp becuase the amp power's on. is there any way i can check to see if everything is working correctly on the line out converter? could i have a defective amp even if it turns on? this is all frustrating all i want is some bass in my car thats it...your help will greatly be appreciated thank you in advance for your help

Answer
Hi Ariel,

Does the lineout converter have a light on it?  If so, is it lighting up?

Testing the lineout converter is difficult unless you can get a device out there that can take the low level input and use it as a source for sound (ie a home amplifier while in your garage or something).

Make sure the system in your grand cherokee doesn't have an amp already -- some of them have amplified speakers, so the sound going to the speakers (that you tapped into) are low-level already.

Justin