Gm Alternator Wiring Computer. The pictures below show the front and rear of a SI alternator and a picture of the connector that plugs into the alternator. Make sure all connections including battery ground cable are clean and tight.
A one-wire alternator doesnt use the two-wire connector which supplies electrical current to facilitate use of the idiot light. Alternator ground connection is the casing grounding back through bracketing and eventually through battery ground cable. GM vehicles use GM alternators Ford vehicles use Ford alternators and so on.
The only drawback to using a one-wire alternator in GM vehicles has to do with the ALT warning lamp idiot light on the dash.
Almost any GM with a CS130 or CS144 will have the required connector. The only drawback to using a one-wire alternator in GM vehicles has to do with the ALT warning lamp idiot light on the dash. 9 - If installing an alternator with OEM wiring connections reconnect alternator wires and battery ground cable. One of the key differences is how the internal voltage regulator determines charge rate.