there again, depends on your load. I imagine you got the 30 amp, assuming that's what it is, because that is what they had in the inline fuse. if you figured your load like I discussed earlier, then get a fuse with the appropriate amperage that is the same physical size/type that you now have. If you used the headlights you had in the original picture (just 2 of the 4), then I would think 15 amps would be plenty, no more than 20 amps. If you have a multimeter, check out the link I posted earlier on continuity checks. There is a link to a youtube showing how to use a multimeter which covers doing amperage checks. You can hook up jumper wires directly to each individual load and check how much current it draws (use the video as a guide). For what you are doing, you can pick up a fairly decent, relatively cheap multimeter $20 or less at auto parts stores or radio shack. a digital one is better for this. here is one that will work
http://www.autozone.com/autozone/acc...ier=64471_0_0_