Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
System Description
The generator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged
The voltage output is controlled by the IC regulator.
Power is supplied at all times to generator terminal B through:
- 100A (QG18DE) or 120A (QR25DE) fusible link (letter a , located in the fuse and fusible link box).
Power is supplied at all times to generator terminal S through:
- 10A fuse (No. 33, located in the fuse and fusible link box).
Terminal B supplies power to charge the battery and operate the vehicle's electrical system. Output voltage is controlled by the IC regulator at terminal S detecting the input voltage. The charging circuit is protected by the 100A (QG18DE) or 120A (QR25DE) fusible link.
The generator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied:
- through 10A fuse [No. 30, located in the fuse block (J/B)]
- to combination meter terminal 26 (without tachometer) or 41 (with tachometer) for the charge warning lamp.
Ground is supplied to terminal 13 (without tachometer) or 19 (with tachometer) of the combination meter through terminal L of the generator. With power and ground supplied, the charge warning lamp will illuminate.
When the generator is providing sufficient voltage with the engine running, the ground is opened and the charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a fault is indicated.
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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.
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