no start after battery change

[pablopicasso46]

Security light does not flash, so I know it's not a VATS issue

I'm not sure if they tried jumping the purple wire to the +, but I will find out later today,and if not have them try that..I assume the key doesn;t need to be on for that, I think, as I said , they did measure the voltage in the purple wire while tryingto start it and it was 11.5v..which, as I understand it , is what powers just the solonoid and should be enough for that? I did just go down to the shop and try to start it and interestingly, I discovered that the new battery was completely dead .no int lights or anything,so maybe there is a drain on it somwhere? I jumped to my truck..which has always worked before,but this time nada.. When i turned the key the voltage on the dash gauge did drop by about 4 v and I lasitened closely but I didn't hear any click so does that mean it;s most likely the solonoid(and not the starter itself?) As yousaid Dynomite, I find it odd that the starter would go out just whe the batery was changed(?)

Thanks again

Will figure it out eventualy , I'm sure