Are 10SI and 12SI alternators interchangeable?
There is no visual difference. 10SI and 12SI are Delco Remy model number designations, but not part numbers. The model 10SI was built in several different output ratings, and assembled with any one of four available “clock” positions for different mounting bracket arrangements.
What is the difference between a 10SI and 12SI alternator?
Out back, a 12SI has much larger cooling vents than a 10SI, and a 10SI has more cooling vents than an older DN-series alternator. Besides having a higher amp output, SI-series alternators also begin charging at much lower engine rpm (which is beneficial when cruising, for example) than older-style alternators.
What is the exciter wire on an alternator?
The exciter wire is used to turn on the voltage regulator. This wire, when unplugged, should have approx. 12.5 volts with the key on. If it does not then the alternator will not work.
What does SI stand for on alternator?
The “Si” in the model number stands for Systems Integrated, meaning that the voltage regulator is inside of the alternator.
What is a GM 10SI alternator?
The 10SI GM style alternators have a custom voltage regulator that lets the alternator be used as a 1-wire alternator or can be factory wired using the OEM plug. Available in a variety of finishes, these alternators output 100 or 140 amps. Every Tuff Stuff alternator is hand built and load tested in Cleveland, Ohio.
What is a CS130 alternator?
Tuff Stuff’s CS130 GM style alternators have a custom voltage regulator that lets the alternator be used as a 1-wire alternator or can be factory wired like the OEM alternator. Available in a variety of finishes, these alternators output 105 amps or 160 amps.
How do I know what GM alternator I have?
How to Identify GM Alternators
- Examine the Delco-Remy alternator. The alternator is located at the front of the engine, usually toward the passenger’s side of the block.
- Locate the Delco-Remy identification tag or sticker. At the factory, Delco-Remy places an identification tag on the alternator housing.
Do I need a diode for my alternator?
One wire alternators self excite, so no diode needed. However you will have to rev the engine a bit for the 1 wire to start charging.
How does a diode connect to a battery?
A diode can be connected to a battery in two ways, either forward or reversed- biased. First is reverse-bias, the anode of the diode to negative terminal of the battery and the cathode to the positive terminal of the battery.
Do all alternators need an exciter wire?
The alternators on most modern vehicles have internal voltage regulators; therefore, they don’t need an exciter wire to function properly.
What are the 2 small wires on an alternator?
The positive and negative cables are small and connected to the respective terminals of the battery. The alternator also shows a connection with the ‘battery charging wire.