I need to identify speaker wires from hot and ground wires for a 1957 FoMoCo 12 volt radio [ Not installed.] There are two black wires on the left side of the case. One is soldered to a copper plate on the case, which also has a bare copper wire going to a copper coil.. The other goes to separate copper plate on the case, along with a wire to the on-off switch. These both appear to be grounded to the case.
In the back of the case is a fibre plate with two small holes for a plug-wire. The smaller [[green] wire goes to a larger copper coil which also goes to ground.. The larger hole goes to a ground on the case via a black wire.
I appreciate any help as I do not wish to blow anything out.
There are actually 4 wires on the right side 2 are speaker wires and the other 2 are the positive and negative connections . the black wire is positive supply and the green/red wire is negative earth . strange wiring !!
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Most amps have 3 places where you need to hook up wires to power them. the 1st is a ground wire that at best is 1 foot long and it goes on the ground or negative 12 volt connection then a bolt on the car you may need to sand off the paint for it to work, 2 a RMT or remote wire that is normally in the middle of the power and the ground connections the remote turns the amp on and off so it needs to go to the remote wire on the radio or a ignition spot on the fuse box - turns on with key on and off when you turn the key off , 3 the power wire is hopefully large 4 gauge wire and goes to the + 12 volt plug on the amp this wire has a in line fuse and goes to the battery and to the amp only. RCA wires go from the radio to the amp and are round and just plug in with no screws some factory radios need a conversion kit you can get at walmart for RCA wires. the speaker wires have some sort of mark or line to tell you what to put were like if you put the line on a negative on the amp you need to put the line on the negative on the speaker box to or it will not bass and could hurt your amp. ask me if you need anything else :) and please rate :/
Because of the year of the truck you will not have any wires pre-wired in the truck, go to a Radio Shack, car audio store or Best buy and buy yourself some speaker wire for vehicles, about 5 ft of 14 - 16 gauge yellow wire, 5 ft of 14 - 16 gauge red wire a couple of 10 amp fuses and 5ft of 4 gauge black wire.
You are going to run the Yellow, Red, Black wires together from the radio space where the radio sits in down to your steering column, the speaker wires will go to your speakers from the radio, a + and a - lead to your speakers and connect them as needed.
Now back under your dash you will connect the yellow wire from the radio to the 12 volt + wire under your steering columns 12 volt power wire with a fuse inline, if you hook up a test light to this wire it will light up the test light without the car switch being turned on, the red wire will hook up to your ignition switch wire and your balck wire to the vehicles ground chassis, basically ground that wire to a non painted surface of the vehicle. This radio needs to be hardwired like I explained.
very simple run a ground from gnd on amp to a good ground spot on car run 12 volt power cable from back of fuse relay by battery to 12v+ on amp then splice blue wire on back of stereo splice in another wire about seven feet run that to remote on amp then hook up speakers its pretty simple to hook up an amp hope this helps
With all amplifiers for a car, you must have the main power connections B+ and ground connected, and then you must also have the remote turn on connected as well. This is the way the amp turns on. It comes from the radio and is usually the blue wire from the harness off the back of the radio. When the radio is turned on, the blue wire gets 12 volts sent to it so it can turn on an external device like an amplifier or the power antenna. Make sure you have this connected to the amp and that the radio is turned on. Then check the voltages at the power terminal of the amplifer. You will have the ground, the main B+ of 12 volts, and then the turn on voltage of 12 volts. If you have all of these, then you need to troubleshoot it more. It will turn on without the speakers connected, but I am not sure why you would want to connect it without the speakers. It will also turn on without the RCA cables connected for the audio input as well. But just to turn on the amplifier, all you need is those three things i mentioned. Let me know if you require any further help.
You need to confirm that you have sufficient B+ and remote turn-on voltage.
With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp 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.
Sounds as if you either have some bad wiring probably on the 12volt side or a major problem with the amp. Seeing as how it's new I'd be taking it back to the retailer. I just hope you didn't reverse the polarity of the 12 volts or maybe put 12 volts up a speaker output. That could mess with the warranty somewhat. Are you sure you have the 12 volts connected to a good solid supply and the earth a good one too. I always ensure any heavy drain equipment is connected directly to the battery with heavy duty wiring and well fused.