Standard GM 4pin plug with single yellow wire that connects to a 12v key on/off switch from the vehicle. Can be hard wired into an OEM harness for stealth look or sourced directly from the vehicles fuse box under the hood. All of our custom plugs are crimped, soldered and epoxied for maximum durability and safe from weather elements. This is the same harness that we include for free on many of our older GM fitments, custom/universal and RVC Bypassed alternators.
If we use this much detail for a single wire, you can imagine how we build all of our alternators!
