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.
1990 Chrysler ImperialFACTORY OEM SERVICE PROCEDURE
Rectifier Assembly Test
- Check rectifier assembly for poor solder joints, cracks, or signs of overheating. Using an ohmmeter, test for continuity from positive diode pin to positive heat sink. See Fig 1.
- Reverse ohmmeter test probes and repeat test. Test should show continuity in one direction only. Test for continuity from negative diode pin to negative heat sink.
- Reverse ohmmeter test probes and repeat test. Test should show continuity in one direction only. If failure is detected in either test, replace rectifier assembly.
Factory Service Tools
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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.