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.
Power Transistor
Connect negative terminal of a 3-volt power source (equivalent to 2 flashlight batteries connected in series) to terminal No. 2 of power transistor. Check for continuity between terminals No. 2 and 3 with positive terminal of power source connected to terminal No. 1. See Figure. If continuity exists only when 3 volts is applied, power transistor is okay. If continuity does not exist, replace power transistor
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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.