Remote wire my radio will not turn om my amp

If u are using a factory radio it may not have a remote turn-on (Usually the blue wire on the main connector to radio. and do not connect to any blue wire without checking the voltage) if there is not blue wire (remote) you can connect your amp to the red 12v (accessory) wire which will turn on amp when key is in accessory position and works the same and will not hurt your amp. If u do use this method and a pop is introduced when turning on radio and amp may need to purchase a relay to delay the amp turn on.

remote is generally blue out of the deck however if it is stock radio wire the amp remote to the accessory circuit on the back of sterio this will turn on the amp when your radio comes on instead of the radio turning on the amp there should be a memory wire that is hot all the time and a accessory wire that turns on the radio when the key is on

Cut the remote wire from the radio.
install a relay in line
the relay will have 4 or 5 terminals
connect terminal 87 to battery power and fuse it at 3amps
connect terminal 86 to the remote output from the head unit
connect terminal 85 to ground
connect terminal 30 to your amp turn on wires
this allows the turn on load to run thru the relay and not directly off the radio remote output

connect the red wire of the amp to a car battery (+). the black to a car metal and the remote cable to the blue wire in radio. when you turn on the radio the amp turn of--when you turn off the radio the amp turn off.

check the amp. fuse, if this is OK with the radio On check the turn on wire at the amplifier must have voltage if not, check if this wire has voltage at the radio if there is voltage, the wire is broken some where.

Do you have the remote turn-on lead hooked up?

There should be 3 wires on the power side of the amplifier.

Ground - to the car chassis
Power - to the car battery
Remote - to the remote turn on lead from the head unit. (this emits a 12V signal to a relay inside the amplifier for it to turn on when the radio does)

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

You have the wrong wire hooked up to the 'remote' input on the amp. The remote input waits for a discrete 12v+ signal from the radio. You have the 'power antenna' wire hooked up to the remote input. The power antenna lead shows 12v+ when the radio is on, but as soon as you change the source to CD, the power antenna drops the 12v+ and shuts your amp off. If you're radio has a blue/white wire, use that to turn the amp on instead of the blue wire you are currently using. If there is no blue/white wire, either the radio uses a non-standard color or the radio does not have the necessary wire. In the case that there is no true 'remote' wire, you can get away with using the accessory wire to the radio. That would be the red one. Jump that one over and you'll be running.

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.

The Remote wire should connect to the remote turn on lead from you radio(most aftermarket radios use a blue and white or a blue wire for the remote turn on). This wire will send a 12v signal to the amp from the radio when the radio is turned on. You can disconnect the remote turn on lead from the amp and jump a wire from the terminal marked battery to the remote turn on terminal just to see if the amp powers up. Do not leave it this way however because your amp will not shut off and your battery will go dead.

Hi Jon,  you need to hook the Remote wire up to the Radios  Blue remote wire.  The car battery power stays on all the time.  The blue Remote wire watches to see when the radio turns on, and signal the amp to turn on as well.