20 Most Recent
Pyle PLMRA420 Car Audio Amplifier Questions & Answers
Newly Installed Car CD Player won't power up
When you see this problem, it usually means you have power on your deck's constant power wire (usually yellow) but no power on the accessory power wire (usually red). The accessory power wire is the one that sends voltage to the deck when the key is turned on.
Usually this means that the red wire is either connected to the wrong vehicle wire, or that the vehicle's radio fuse is blown. As a last resort, you can disconnect the red wire from whatever it's connected to, and re-attach it to the same connection as your yellow wire. This should allow the radio to power up, but it won't turn on and off with the key-switch; you'd have to remember to turn it off or remove the face when you leave the vehicle, or you may drain the battery.
Alternately, you can extend the red wire to a different source of key-switched voltage. Depending on the vehicle, you may be able to find this behind the cigarette lighter, at the key switch itself, or at the fuse box.
My amp
I'll assume that you've checked the amplifier's on-board fuses.
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp (not on the point where the ground wire connected to the vehicle) and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. If the voltage is below ~11 volts, you need to check the wiring feeding whichever line is too low.
Let me know if you have any other questions.
No Power
Make sure u have power at the back of the radio. U said u replaced the fuses in the fuse box. Some aftermarket units have in-line fuses that can be open. So, check to see if there is an in-line fuse for the memory/back-up and B+ leads. If there is, more than likely, one of them is blown.
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