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 MANUALSCADILLAC1991SEVILLE V8-300 4.9LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICS4T60-E AUTOMATIC TRANSAXLEBRAKE SWITCH TESTALL EXCEPT CWW MODEL
1991 Cadillac Seville V8-300 4.9L
All Except CWW Model
1991 Cadillac Seville V8-300 4.9LSECTION All Except CWW Model
1. Unplug wiring harness at transaxle.
2. Turn key to run position.
3. Using a unpowered test light, ensure a good negative ground and place probe in vehicle harness connector terminal A. Test light should light.
4. Apply brake pedal. Test light should go out. If it does not, brake switch is not adjusted correctly or not functioning properly.
RENDER: 1.0x
NO RELATED
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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.