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 MANUALSJAGUAR1993XJ6 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMTESTINGPRESSURE WARNING SWITCH
1993 Jaguar XJ6 Base
Pressure Warning Switch
1993 Jaguar XJ6 BaseSECTION Pressure Warning Switch
NOTE:
Some testing on fluid level warning switch is referenced in this procedure. Fluid level warning switch is electrically tied to pressure warning switch.
- Ensure ignition is off. Depressurize brake system. See DEPRESSURIZING BRAKE SYSTEM under REMOVAL & INSTALLATION. Using DVOM, check for continuity between terminals No. 8 and 51 of ABS ECU connector. If continuity does not exist, pressure switch is okay. If continuity exists, go to next step.
- Disconnect pressure warning switch connector. Connect a DVOM between pressure warning switch terminals No. 3 and 5. Continuity should not exist. If continuity does not exist, go to next step. If continuity exists, replace pressure warning switch.
- Ensure ignition is off. Connect a DVOM between ABS ECU terminals No. 1 and 8 and then terminals No. 1 and 51. Continuity should not exist. If continuity exists, check fluid level warning switch and/or pressure warning switch for a short to ground. Check wiring harness between fluid level warning switch, pressure warning switch and ABS ECU for a short or open circuit. Repair wiring as necessary.
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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.