How to Troubleshoot an Alternator on a Dodge | It Still Runs The alternator on your Dodge, whether it's a car, truck or van, is an essential piece of its electrical system. In fact, if the alternator is not working perfectly, your Dodge will soon begin to experience serious problems. For example, with an improperly functioning alternator, the battery will quickly drain. How do you wire a Dodge alternator - Answers On a dodge alternator the two small wires go to the voltage regulator. It doesn't matter which wire goes where, but the red or blue wire needs 12 volts when the key is on. The green wire goes..