my tracker (sunrunner) keeps killing alternators, not funny any more.<br /><br />my alternator light lights up when the car is first turned to ignition on, then goes off, does not turn back on even if the alternotor stops charging. <br /><br />battery voltage is 12.2-12.5, tried with 2 different batteries, when running, it slowly creeps from 12.5 to 13v. if I leave the car run more than 20 seconds, the alt will fail, charging voltage drops to battery voltage<br /><br />in about 5 seconds of running, the armature pulley gets super hot. It does not do this if I remove the excitation and warning lamp plug. Reconnecting either wire it jumps to 14.5V for about a second then drops to 12.5 and starts to creep up to 13v.<br /><br />With an ammeter connected, I get about 18-20 amps of charge. <br /><br />I strongly suspect there is something wrong in the warning computer, but I cannot find it's location. <br /><br />Any ideas would be appreciated, I'm drawing a blank. (does not happen often, I'm an electrical engineering technician)
<br /><br />There are no control modules in the ckt. Everything is intigrated into the alternator.<br /><br />Here is a wiring diagram of the starting and charging system. Hope it helps. It's two pics, if you'll print them then put them together it's easier to tell whats what. They came from two pages, had to print each page seprately.<br /><br />
