3 Ways to Wire an Amp to a Sub and Head Unit - wikiHow MethodThings Needed Turn your vehicle off and pop the hood. Do not put the keys in the ignition; your vehicle cannot be running when you run your power cable and hook up your head unit, amp, and sub. Press the button or pull the lever in your vehicle to unlatch the hood from the engine. Raise the hood of your vehicle and lock it in place. If you can, do this indoors. Wiring a sub, amp, and head unit can take Disconnect the negative terminal on your vehicle’s battery. Take the cover off of your vehicle’s negaSee all 9 steps on wwwhowVideo Duration: 4 minUploaded: Views: 1M Wiring Diagram For Amp To Head Unit Valid After Ket Sub The digital imagery with the title Wiring Diagram For Amp To Head Unit Valid After Ket Sub Ums Best Of Subs And above, is tagged with : Wiring Diagram For Subs And Amp, .