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.
Bench Testing: Rotor
Check rotor slip ring surfaces for contamination. If surface is rough, a #500 or #600 piece of emery cloth can be used to polish slip ring surface. Ensure rotor bearings rotate smoothly. Using ohmmeter check continuity between slip rings and rotor, individually. Check continuity between slip rings and rotor shaft, individually. See Fig 1. If continuity exists, replace rotor. Check continuity between slip rings. If continuity does not exist replace rotor.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.