Originally Posted by Al Skierkiewicz (Post 1109521)

If the terminal was flat but the wires still pulled out, the terminal likely was too large for the wire. The terminals are color coded for ease of use. Red for #18-#22 wire, Blue for #16-#14 and yellow for #12-#10.
If you were using the crimper that comes in the KOP, that crimper is designed for uninsulated terminals. It can be used for insulated terminals if one is careful. In either case (insulated or non-insulated), please note there is a concave part of the tool and mating bump on the other side of the jaw. When you set the terminal in the crimper, note that the terminal is merely a flat piece of metal that has been formed into a cylinder. The slit or open side of the terminal must be placed in the concave portion of the tool. If you set the terminal into the tool with the slit facing the bump, the bump will push open the slit and release the wire. If you are using insulated terminals, I suggest you purchase a crimp tool designed for those terminals.

Originally Posted by imjessica (Post 1109823)

thanks ill probably buy a better crimper. yeah thats exactly whats happening the thing is flat but the wire slides of. im using the yellow terminal which i know is for 12 gauge wire and im using 12 gauge wire so i cant figure out why its happening.

Originally Posted by imjessica (Post 1109009)

would it be easier to use electrical tape because we don't even have a crimping tool yet. also @al thanks that was a really helpful answer

Originally Posted by engunneer (Post 1108928)

My last crimping hint is to buy a good crimper. The one that comes in the kit is functional, but it's harder to make a crimp that passes the tug test. something like Mcmaster #69555K62 is 10 times better than something like #7007K92.