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Generator Load Test

WARNING: This page is about a different car, the 2001 Mazda Tribute, 2001 Mazda B4000, 2001 Mazda B3000, 2001 Mazda B2500, and 2001 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to OFF position. Switch DVOM to ammeter function. Connect positive and negative leads to corresponding battery terminals. On pickups, connect current probe to generator connector A-172 (Black/Orange wire) located on generator. On Tribute, connect current probe to generator connector X-102b/c (White/Yellow wire) located on generator.
  2. Start engine. Turn A/C on, blower motor switch to HI speed position, and set headlamps on HI-BEAM . Increase engine speed to 2000 RPM, while observing voltage output. If voltage rises at least .5 volts, the generator is operating normally. Go to next step. If voltage rise is not .5 volts, replace generator. See GENERATOR  under REMOVAL & INSTALLATION. Retest system for normal operation.
  3. With engine running at 2000 RPM, monitor generator amperage output. If generator output is 58 amps or more at 2000 RPM, generator is operating normally. If generator output is not 58 amps at 2000 RPM, replace generator. See GENERATOR  under REMOVAL & INSTALLATION.
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