glad you found the problem ! it's a common misconception that if the diameter of the[assembled] wire is bigger, it's better. unless you know for SURE, such as in a cut away sample, it's just a guess. look at jumper cables as an easily checked example. there are an amazing amount of 'em out there that look like the best cables you will ever need in two lifetimes. till you look at the connection where the cable wire meets the clamps. then you find out the insulation is five times bigger than it needs to be compared to the wire size. same goes for battery cables. lots of insulation [correct color and diameter] not so much wire inside. this applies to standard parts store replacements and reproduction items equally. you should spin over with ease now !