How to Wire a Chevy Alternator | It Still RunsThe GM alternator used in all Chevrolet models is easy to install, as it is connected using only a few wires. The alternator converts the engine's mechanical rotations into an electrical current using a pulley-and-belt system. This current is fed to the car's battery, charging it for later use.
How To Wire Alternator Charge wire connects from the alternator to the battery through the the resistor or directly to the key switch itself (switched side). This wiring configuration will excite the alternator to start charging when the engine is running at low RPM’s.
Alternator Selection: Installing a OneUpgrading the charge wire is highly recommended, as the factory wiring might not be up to snuff with the new, high-output alternator. Tuff Stuff has dedicated charge wires that are large enough to carry the amperes, and have high-quality, crimped-on brass connectors.
Wiring up the GM 10SI Alternator Some other tidbits available from AC Delco for wiring up a 10SI, is wiring package 1870921 (for those 6 to 12volt conversions). This contains the terminal connector AND an extra resistance wire pigtail to connect to the ignition system (don't use a ballast resistor if you use a resistance wire). Also available is an ammeter package (1965400).
THE UNIQUE PART OF THE CHEVY SYSTEM At least one thing about wiring for this Chevy alternator system is very unusual, excessive voltage drop between the alternator and battery will occur with normal system function—and yet the electrical system worked fine. The battery charged perfectly and electrical system performance was not compromised in the least bit.
How to Identify Your GM AlternatorUsed on Buick, Cadillac, Chevrolet, GMC, Hummer, Pontiac, SAAB, Saturn History of the GM Alternator . This is just a quick visual identification guide for Delco type alternators. 10DN - 12 Volt, 61 Amp - 1963-1972. First Alternator used on GM Vehicles to replace old DC Generators. External regulator mounted on the firewall.
WIRING DIAGRAMS Wiring harnesses are joined by using a multiple plug and receptacle connector block, or a terminal post chassis junction block. In the instrument panel area plastic insulated blade-type connectors and screw-type terminals are used.
Delco 10Terminal 2 or "F" is normally connected through a junction block to the battery "hot" wire to the ignition switch. However, in this case, the wire from terminal 2 should be attached to the large battery stud on the back of the alternator, which is the same connection for your battery positive wire.
Quick Test: Faulty Alternators With the engine running, connect a jumper wire from the connector's B+ Terminal to the connector's Field terminal (on most GM cars, that's respectively the red and blue wires).
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