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.
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HOMESERVICE MANUALSSAAB19949000 CD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCHARGING SYSTEMSALTERNATOR & REGULATORTESTINGBENCH TESTINGROTOR
1994 Saab 9000 CD, Standard
Bench Testing: Rotor
1994 Saab 9000 CD, StandardSECTION Rotor
- Set ohmmeter to lowest scale. Connect ohmmeter across slip rings. Resistance should be 2.7-2.9 ohms.
- If resistance is too low, rotor has short circuit and must be replaced. If resistance is infinity (no continuity), rotor has open circuit. Replace defective rotor.
- Set ohmmeter to X1000 scale. Connect ohmmeter between either slip ring and rotor core. No continuity should exist. If continuity exists, rotor is grounded and must be replaced.
- Clean slip rings using fine sandpaper. Worn or pitted rings should be turned on lathe. Minimum slip ring diameter is 1.06" (27 mm).
- If slip rings are beyond repair, remove rear bearing from slip ring end of rotor. Unsolder wires from slip rings and bend up ends of rotor winding. Pull off slip rings. Ensure ends of rotor winding are not damaged.
- Insert ends of rotor winding into slip ring and press new slip ring onto rotor. Slip ring end must be .141" (3.58 mm) from end of collar. Solder rotor winding to slip ring terminals. Turn slip rings on lathe and retest rotor. Maximum slip ring runout is .001" (.03 mm).
RENDER: 1.0x
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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.