Do I need to install a ballast resistor or did I just get a alternator that went bad? Ignition 1(blue) and Ignition 2(brown) are wired together now without the ballast resistor and really that is all the difference. The car will not run with these two wires not wired together. It seems that Ignition 2 (brown) shouldn't have anything to do with it but it might. Thanks for the help.