lazyjones Posted June 19, 2008 Share Posted June 19, 2008 Just added an amp to the existing sound system to power a new sub. (2002 SC430) Having problems getting the amp to shut off when car is turned off. Anyone know where is a good spot to tie in the remote turn on wire for the new amplifier? I've tried all of the fuses under the hood. They turn the amp on, but do not turn the amp off when the car is shut off and key is removed. Quote Link to comment Share on other sites More sharing options...
cmartin248 Posted June 19, 2008 Share Posted June 19, 2008 It totally depends on how many amps your amplifier will drawn at full load. Your instructions should state the required amperage for your circuit. Depending on the requirements, you can connect down stream of a large fuse circuit, but you will have to install a 12V DC relay which will be triggered from your accessory circuit. Use a tester and find a wire under the dash that is 12 volts with the switch "on" and no voltage with the switch off. The cigarette lighter wire is a good place to start. The relay trigger circuit will only draw a few milliamps from your accessory circuit to make the relay pickup, which can then carry 10-30 amps. Extreme high power amps need their own supply directly from the battery through a fused circuit. The relay can be obtained from radio shack or most auto parts carry them for fog lights ($4-$5). If the amp draws less than 15 amps DC, then you could connect directly to the cigarette lighter wire. Quote Link to comment Share on other sites More sharing options...
lazyjones Posted June 23, 2008 Author Share Posted June 23, 2008 What is the easiest way to access the cigarette lighter wire?? It totally depends on how many amps your amplifier will drawn at full load. Your instructions should state the required amperage for your circuit. Depending on the requirements, you can connect down stream of a large fuse circuit, but you will have to install a 12V DC relay which will be triggered from your accessory circuit. Use a tester and find a wire under the dash that is 12 volts with the switch "on" and no voltage with the switch off. The cigarette lighter wire is a good place to start. The relay trigger circuit will only draw a few milliamps from your accessory circuit to make the relay pickup, which can then carry 10-30 amps. Extreme high power amps need their own supply directly from the battery through a fused circuit. The relay can be obtained from radio shack or most auto parts carry them for fog lights ($4-$5). If the amp draws less than 15 amps DC, then you could connect directly to the cigarette lighter wire. Quote Link to comment Share on other sites More sharing options...
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