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 MANUALSCADILLAC1993DEVILLE BASE, 4D SEDANREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM & TCS - TEVESSELF-DIAGNOSTIC TESTSTEST V: BRAKE FLUID LEVEL SWITCH
1993 Cadillac DeVille Base, 4D Sedan
Test V: Brake Fluid Level Switch
1993 Cadillac DeVille Base, 4D SedanSECTION Test V: Brake Fluid Level Switch
- Turn ignition off. Release parking brake. Disconnect master cylinder brake fluid level switch connector. Turn ignition switch to RUN position.
- Connect a fused jumper wire between terminal "B" of master cylinder brake fluid level switch connector and ground. See Fig 1 . BRAKE warning light should come on. If light does not come on, check and repair open in circuit No. 33 (Tan/White wire).
- Connect fused jumper wire between terminals "A" and "B" of master cylinder brake fluid level switch connector. BRAKE warning light should come on. If light does not come on, check and repair open in circuit No. 151 (Black wire).
- Connect fused jumper wire between terminals "B" and "C" of master cylinder brake fluid level switch connector. BRAKE warning light should come on with ignition switch in RUN or START position. If light does not come on, check and repair open in circuit No. 875 (Light Green/Black wire) and ignition switch. If BRAKE warning light functions properly, replace master cylinder reservoir.
- After all repairs are complete, clear codes, and perform ABS/TCS functional check. See ABS/TCS FUNCTIONAL CHECK CHART (LESABRE & PARK AVENUE) under SELF-DIAGNOSTIC CHARTS.
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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.