What is the blue wire on an alternator?

The blue wire should have 12 volts going through it when the alternator is spinning and should provide a ground path when the alternator is not spinning. It feeds the alternator light and the oxygen sensor mileage counter.

What is the function of the D+ connection on the alternator?

The way I understand the setup, D+ measures the voltage at the battery, and the delta between that and the preset voltage in the regulator drives the field to increase/decrease the output of the generator.

What color is the field wire on an alternator?

Find the terminal on the alternator labeled “Neg”, “F” or “Field.” This is the ground connection. Typical alternators have this terminal although some alternators don’t as they are grounded directly to the engine. The wire that connects to this terminal is black and the opposite end attaches to a metal part of the car.

What are the three wires going to the alternator?

Remote voltage sense alternators: The three wires connected to the alternator are the positive, negative cables and a third smaller gauge wire connected to the alternator remote sense or (S) terminal. To determine if your vehicle has remote sense, voltage will always be present on this terminal at all times.

What kind of wiring does an alternator use?

Typical Alternator Wiring. This is the ground connection. Typical alternators have this terminal although some alternators don’t as they are grounded directly to the engine. The wire that connects to this terminal is black and the opposite end attaches to a metal part of the car. Check if your alternator has a terminal marked “Ign” or “L.”…

What do you need to know about Mercedes wiring?

These Mercedes Wiring information / Aftermarket Autostart/Alarm Technical Wiring Diagrams are very useful, if not required, for the installation of alarms, autostart / alarms, remote starts, doorlock info and any other aftermarket installation that would require you to know the / Wire Information / Wiring Information of your Mercedes

Is there a fourth terminal on an alternator?

Most typical alternators have this wire connection. Check to see if you have a fourth connection on your alternator. The fourth connection is used to wire between the alternator and the voltage regulator. Labeling is inconsistent but is often “S”. If you have a fourth terminal it is for the voltage regulator.

Do you have to disconnect the B + at the alternator?

You have to disconnect the 8pin connector on top the starter bracket as its part of the harness shown in the picture. disconnect the b+ at the alternator with 13mm disconnect the alternator signal connector and ac.Alternator WiringAlternator Terminals Explained | JAS Oceania | Auto Electrical Products

Where are the wire connectors on an alternator?

Inspect the back and sides of the alternator to locate the two wire connectors. One of the connectors is typically a threaded bolt protruding from the back (the opposite end from the pulley) that a wire with a boot on the connecting end is snapped onto.

Do you need an alternator in a 1960 car?

Vehicles older than a 1960 model may require all of the connections of the alternator, except ground, to be connected to positive and negative terminals of an external voltage regulator instead of directly to battery and ignition connectors.