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Discussion Starter · #1 ·
I am looking to keep my factory radio, so I need to signal my amp to turn on from somewhere other than the head unit. I would like for it to remain on after I turn the truck off until I open the driver's door like it is now. Can I achieve this by doing a fuse tap off of the SEO retained accessory power fuse for the signal wire?
 

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only use SEO power with a relay. It's a very very small current supply. Like .3 amps or so. Works well with a relay but I believe you need one with a flyback diode installed to protect the circuit from relay coil spikes.
 
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