Quote:
Originally Posted by aam
Do not disconnect the Battery with engine on............................
You are going to be a very sorry man or woman.
You will fry expensive modules and the icing on the cake is, you are going to fry your gauge cluster.
Go a head make my day. 
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To all that read my post........Take AMM's advise and "DO not disconnect the battery while running"!!!!! I usually use a volt meter for electrical and charging diagnostics but I have used the positive battery cable disconect on both older and newer computer cars without damaging things. But I repeat!!!! If AMM says it will damage your car, PLEASE DONT DO IT !!!!!! I would never want you "To make my day" by damaging your car with info I gave you! Sorry for bad advise.