GRAnd Cheroke 2005 Alternator

Hello everyone: I would like to help me with a problem that I have with an alternator of Grand Cherokee 2005, it happens that a client took us the truck because the alternator supposedly did not carry the alternator in addition to being changed in October last year (2010) the accumulator. The battery is only discharged and the alternator was disassembled to see if the problem from there, all the necessary changes to the piece was made and when installing the piece, they tell me that the piece has two lines to which they are connected one to the computer and the other to the food switch or on, the switch line tells me that it is fine but the other is the one that does not respond so that the indicator is not From the battery on the board and the signal does not arrive, so we think that we must check the line that goes from the alternator to the computer and that line is connected by a regulator. Apparently previously they passed the truck in reverse in the way we think that this affected the computer ... is it true? Please help me or do they suggest me?

Look friend .. I suggest you do the following: you attach the diagram of the Grand Cherokee Limited 2005 and Czech if the circuit is as specified by the diagram (Czech continuity and that there is no short circuit) if it is so and everything is right then something can be bad with the computer. In addition, so you comment on the incorrect connection they made I have not doubt that a component has been damaged. I hope to help friend. Pd if it is not the diagram only tells me well that vehicle is and I spend the correct one.