Installation Issues with Interior Lighting Kit

Ok Guys... this shows my complete lack of electrical know-how, but for the life of me I cannot get my 4 pc expandable million color led kit from en.ofweek.com to work. I purchased the add-a-circuit which gives you a mini-fuse adapter to plug into the fuse box, but when I plugged it in I had no power... not sure if I screwed up stripping and crimping the power wire, or something else. Has anyone else used a kit from these guys?? COuld use some tips. Here's the link to the product I purchased: http://en.ofweek.com/Product/Blue-S...-Lights-DE3175-168-194-prod-16398-599167.html

Any help would be appreaciated.

 

have you swapped polarity? diodes only work in one direction.

 

not sure why you need add-a-circuit, etc.

the bulb is plug and play.