Hello to all Ok i just bought a 91 PU 22re and the guy told me that it just needed a new Battery ok jumped it and off i went Bought a brand new Batt everything is great BUT wait the idiot light on the dash is on hmmm OK check alt took it off and had it checked NO GOOD . OK put new Alt on and Nothing starts runs fine but the batt light stays on? took ALT off and had it checked just to be sure and it works fine . Now i see were the previos owner on the ALT i have a white wire that is power from the Batt and then i have a yellow , white and small red that goes to the round plug . The white wire from the roung plug has power But i am getting nothing from the yellow ? Please help Thank you