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 MANUALSMERCURY1990COUGAR/XR7 V6-232 3.8LREPAIR AND DIAGNOSISBRAKES AND TRACTION CONTROLANTILOCK BRAKES / TRACTION CONTROL SYSTEMSTESTING AND INSPECTIONINITIAL INSPECTION AND DIAGNOSTIC OVERVIEWSYSTEM PRE-CHECKSANTILOCK BRAKE DIAGNOSIS
1990 Mercury Cougar/XR7 V6-232 3.8L
Antilock Brake Diagnosis
1990 Mercury Cougar/XR7 V6-232 3.8LSECTION Antilock Brake Diagnosis
1. Verify that parking brake is fully released. If parking brake is applied, the BRAKE lamp will be illuminated. Check battery.
2. Check Brake Fluid Level as outlined.
NOTE: As the Fluid level falls, the red BRAKE lamp will illuminate. If fluid level continues to fall, the amber CHECK ANTI-LOCK BRAKE lamp will illuminate and the anti-lock function will inhibit.
3. Verify that all of the following connectors are connected:
- 7-pin connector of the solenoid valve block assembly.
- 2-pin connector of the main valve.
- 5-pin connector of the fluid level indicator.
- 5-pin connector of the pressure warning switch.
- 2-pin connector on all four sensors.
- 4-pin connector on the pump motor.
- 32-pin connector of the electronic controller.
- 5-pin connector of the main relay.
- 5-pin connector of the pump motor relay.
4. Check that the fuses and diode are not damaged.
5. Make sure all battery connections are clean and tight.
6. Check ground connections on front end of hydraulic unit and in luggage compartment.
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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.