Originally Posted by platinumb
this is not a good idea most decks have a 500ma output on the remote wire and on many of them it is not fused or protected internally so if you overload it then your deck will have no output from the remote turn on. all manufacturers recommend that even if you are using the remote signal to turn on more than 2 amplifiers you install a relay. technically yes you can do this but a relay is only like 5 bucks and you wont be risking your deck. just because you can do something doesn't mean its right or going to work.
I've been doing this for the past 9 years and installed leds well over a couple hundred times with no issues. Never had a single problem.
It's your truck, if you want to use a relay or a fuse go right ahead, i'm not going to stop you. I am just speaking from my experience as an installer and shop owner.