Reask the question with year, make, and model.
need diagram for 1986 Nissan truck alternator
what wires do i need to hook up to the alternator
alternator charging too high need replacing per dealer
You need to know the firing order to know where your wires go.
Note RADIO CODE before proceeding!!! Disconnect battery Loosen tensioner for the serpentine belt, remove belt. Remove wires affixed to the back of the alternator. Note the wire positions. Remove the 2 bolts holding alternator in place, you may need to remove a brace on the rear of the alternator to the head. Remove alternator. Replacement is the reverse, use the engine decal to reout the serpentine belt properly.
i need to know where the alternator is located on a 1990 Lexus LS400
Need to know what wires and which harness you speak of.
yes to regulate the current before it in to the battery.
see this link How_can_you_tell_if_it's_your_battery_or_alternator_that's_bad
Need to know what engine you have.
Any auto parts store can tell you.
There are many sensors, need to know what year, make, model and which sensor is in question.