Help your alternator turn its output into usable charging current with the Standard Ignition Alternator Rectifier Set D-16 (also written D16). The rectifier is the alternator's internal component that converts the alternating current produced by the stator into the direct current that charges the battery and feeds the vehicle's electrical system.
It fits many vehicles, among them the 1983-1990 Jeep Cherokee 2.1L / 2.5L / 2.8L / 4.0L / 4.2L / 5.9L and the 1987-1990 Jeep Wrangler 2.5L / 4.2L, along with a wide range of Buick, Cadillac, Chevrolet and GMC models. See the Buyer's Guide tab for the full list of vehicles and engines.
- Part type: alternator rectifier set, Standard Ignition part number D-16.
- Function: rectifies the alternator's AC output to DC for battery charging and the vehicle's electrical loads.
- Coverage: direct-fit replacement for the listed applications across many engine sizes. Match your exact year and engine in the Buyer's Guide tab.
Signs a rectifier may need replacing include a battery that does not stay charged, dim or flickering lights, a lit charging warning light, or a whine through the radio speakers. These symptoms can have other causes, so test the charging system before replacing parts. If a failed rectifier is the cause, this set replaces it as part of an alternator repair.
