Plugs & Harnesses

Shop Mechman® alternator plugs, adapter harnesses, and voltage boost harnesses for supported GM, Ford, Toyota, Lexus, and Scion charging systems. These parts let a high output alternator connect to a factory plug that does not match, or raise regulated charging voltage for lithium and AGM battery systems.

Adapter harnesses cover common conversions such as GM 4-pin to Ford 6G, GM oval to Ford 3G/4G, Ford 4G to 6G, and CS to AD indicator plugs. Voltage boost harnesses are available in graduated increases from half a volt up to 2.5 volts, so you can match the charging target your battery chemistry requires.

Connector type varies by vehicle and by alternator. Compare your factory plug against the product photos and listing notes before ordering. If you are unsure which harness your build needs, contact Alternator Outlet before you buy. See also voltage control modules and regulators.