electrical

I'm not sure which little wire your talking about? Note the diagram.

I can't tell based on the diagram but there is the hot wire from the battery that bolts on to the alternator and then there is a plug with two wires on it...The larger gauge of the two wires is hot..The smaller gauge of the two wires is sending a voltage that becomes inconsistant (or pulsing) at times and causes all the electrical system to pulse along with it...I'd like to know if that current originates at the ecm or a circuit breaker..Thanks for your help...

You click on the diagram to make it larger, note the wire color. Also, look at the letters on the wiring connector, l--s--f ? I'll double check wiring.

To add, this is info for your charging system. Engine running, I don't want to see less than 13 volts, as much over as I can get. Are there driveability issues?

I'm going to guess that that it is the wire marked "l" , I have already replaced the alternator and battery with brand new ones, I feel it's a faulty relay or module but don't know how to locate it...I am not a mechanic by any means...Thanks again...

I didn't see an I in the diagram, did you mean L? Forget the pulsing wire for a minute, what is the actual problem? Is the charging system not working? The L terminal goes to the pcm.

The actual problem is the pulsing..It causes everything in the van to pulsate..headlights ,interior lights and the engine loses power with every pulse..I now believe it's the pcm..I'm going to change it out...Thanks for your help...

Good luck