Just installed a new Bosch alternator in my van after my old one's bearings failed (which worked surprisingly well given the thick greasy coating in and around it from a leaky PS leak the PO hadn't bothered to fix )

I topped off the battery with a charge and installed it, started it up to a christmas dash! The radiator light will stay on regardless because I accidentally broke on of the wires form the sensor in the overflow tank (plan to fix that) but the brake, battery, and oil lights all came on after installing the new alternator and haven't gone away after driving it for a few days.

It could be related, but I also have noticed the van starts intermittently every now and again since installing the new alternator - like the starter isn't getting power or something. Just click, click, click, and after sitting and trying 4-5 times it starts right up fine. Usually it starts up fine first try however.

The harness seemed to be in good shape when i reinstalled. Anyone that could give me some inspiration on what might be the problem? Is there some messed up wiring somewhere i need to replace?