What are the two wires on a GM alternator?
The 10- and 12-SI units use a different two-wire connector plug on the rear of the alternator. The Number 1 wire on the 10- or 12-SI is connected to the charge warning light on the dash. The Number 2 wire is what is called the voltage sensing wire.
What does L and R mean on alternator?
“L” is the warning light connection as you realise. “R” has at feed to it from the ignition switch. It is connected inside the regulator to ” L” by a resistor ( 50 ohms ) It provides the initial excitation for the alternator traditionally provided by the current flowing through the warning light.
What is the R terminal on a GM alternator?
A key to identifying your alternator terminals
| Terminal | Definition | Notes |
|---|---|---|
| R | Relay | Output to charge relays, etc |
| S | Sense | Battery Voltage sense wire |
| S (FORD) | Stator | Stator Pulse. Used for tachometers |
| T | Tach | Stator Pulse. Used for tachometers |
How do you hook up a GM 1-wire alternator?
How to Install a 1-Wire GM Alternator
- Disconnect the negative battery cable at the battery.
- Mount the alternator to the engine.
- Follow the battery positive cable from the battery to where it is connected on the starter relay.
- Reconnect the negative battery cable to the battery.
How do you wire a single wire alternator?
Connect a 10-gauge wire from the output stud on the alternator back to the positive battery terminal. Make both connections with a solderless ring terminal. This connection can be made at the starter relay also, as long as it connects to the same terminal as the positive cable from the battery. Reconnect the negative cable to the battery.
How many wires go to an alternator?
There are 3 wires needed to run it and the case provides the path to chassis ground Even though there are 3 wires, it is very easy to wire up. Here’s a desciption of the wires: Battery positive (Bat+) connect to starter +12V battery wire. use 10 ga wire (thick) Screw on terminal on the back of the alternator
What are the wires for on alternator?
The three wire types in a three-wire alternator include the battery positive wire, the voltage sensing wire, and the ignition input wire. The battery positive wire connects to the starter. The voltage sensing wire connects to the battery, and the ignition wire connects from the alternator to the key switch.