WARNING: This page is about a different car, the 2004 Mazda Tribute, 2003 Mazda Tribute, and 2002 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Prior to performing generator testing, turn OFF all electrical components. Place transmission in NEUTRAL, apply parking brake.

Switch the battery tester to the ammeter function.
Connect the positive and negative leads of the battery tester to the corresponding battery terminals.
Connect the current probe to the generator B+ output terminal, circuit (Yellow/White wire).
With the engine running, turn the A/C on, the blower motor on high speed and the headlights on high beam.
Increase the engine speed to approximately 2000 RPM. The voltage should increase a minimum of 0.5 volt above the base voltage.
- If the voltage does not increase as specified, perform GENERATOR NO LOAD TEST .
- If the voltage increases as specified, the charging system is operating normally.
Adjust the tester load bank to determine the output of the generator. Generator output should be at least 58 amps. See Fig 1.

Fig 1: Identifying Generator Amperage Output

Courtesy of MAZDA MOTORS CORP.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Generator Load Test

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?