I've seen a couple threads with people asking about which wires to use for the electric choke and or the fuel pump power. On the truck side plug that used to go to the mikuni carb there is a row of wires that go: Green wire then Red wire, then black with red stripe and then black with white/yellow stripe. These two are powered only when the ignition key is in the second position or "on".



Ignore what I said about using the fuse tap on the horn fuse. This is a "switched" power source, but it is "hot" when the key is in the first position or "ACC". This means that if you just want to listen to the radio the fuel pump is going to be on.



And here is the video of the whine...its pretty noticeable even with the hood closed.