Originally Posted by shadyluke
I have a Cobra 18 WX ST II CB radio I am putting in my truck. It is a three wire hookup. One of the wire is a acc. wire so the radio cannot be accidently left on. I was assuming the best place to wire this in was the radio acc. wire. However I also have my OHC hooked in here and also wanted to switch another relay with this wire. My problem is I don't know how much everything draws so I don't know how many devices I can switch with the radio acc. wire. Any help would be appreciated. Thanks,
I don't know what the draws are for the various items.
There are only two fuses that are hot in both ACC and RUN. You don't have a lot of choice here.
#20 (7.5A) feeds the audio unit, the GEM and the power window safety relay. The other is #16 (30A) for the windshield wipers.
You could use a relay triggered by the wire from #20 to control a new 20A circuit for your add-ons. That should give you all the capacity you would ever need.