The other day I changed my spark plugs, easy enough. Until I hooked up my optima battery backwards! I wasn't really paying much attention I guess. I have never done this on anything before. The key was never turned on, none of the fuseable links were burnt or affected. But the alternator fried the diodes. Puff of smoke and gross electrical smell.
So I took the alternator and got a reman from auto zone. Now when I hooked everything back up I was not charging to my knowledge. I was only getting 12.05v from the battery terminals while the car was running. Also as I run the car and use the accessories like lights, fan,heater fan, and so on, I see that the voltage meter is dropping in volts as I turn on more accessories.
Currently I do not have the yellow wire in the alternator plug harness hooked up to switched power. Does this wire need to be tied into a switched power source to activate the voltage regulator? I will try and take some pictures for more clarity.
I currently have the wiring as labeled below
90' 2.2 3wire alt plug.
White from the plug ties into BLK/White(ea harness)
Blk/White from the plug goes to charge light Red/White(ea harness)
Yellow wire was not connected.
I have read that people have hooked this yellow wire to a switched 12v power source. To activate the voltage regulator.
I have not had this wire hooked up before and my battery after 5400mi on the swap is still @12.5v
Do you think this has anything to do with the new alt needing this switched wire? If so can I tie into the coil wire from the old harness? This is the most accessible 12v switched source to my knowledge. Thanks for any advice!
Edited by snofool, 25 February 2014 - 02:38 PM.