Mechanics

BRAKE PROBLEMS PLZ HELP

1998 Ford Ranger

Brakes problem
1998 Ford Ranger 4 cyl Front Wheel Drive Automatic 34,000 miles

My brakes (when stepped on) they feel spongy and dont work until pressed down all the way. Plus the ABS lights and brake warning lights are on whats wrong and how can it be fixed plz help
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Htdixon
April 28, 2009.



HARD OR SOFT BRAKE PEDAL
If valve assembly problem is suspected, check for: Stuck closed isolation valve (hard pedal).
Leaky dump valve (soft pedal).
If vehicle electrical problem is suspected, check for: Brakelight switch always on while vehicle is driven.
If basic brake hydraulic problem (soft pedal) is suspected, check for: Hydraulic leak in brakeline or hose, fitting, master cylinder, wheel cylinder, or caliper.
Air in brake system.
If basic brake mechanical problem (hard pedal) is suspected, check for: Brake related problems such as little or no vacuum boost, stuck or inoperative wheel cylinder or caliper, or pinched or crimped brakeline or hose.

Red BRAKE Warning Light Check
Turn ignition switch to START position. Red BRAKE warning light should illuminate. If warning light does not illuminate, go to RED BRAKE WARNING LIGHT DOES NOT SELF-CHECK under TROUBLE SHOOTING.
Allow ignition switch to return to RUN position. Red BRAKE warning light should go out. If warning light remains illuminated, check parking brake switch. Repair/replace switch as necessary. If warning light remains illuminated and parking brake switch is functioning properly, go to RED BRAKE WARNING LIGHT ON WITH IGNITION SWITCH ON under SYMPTOM TESTS.
Yellow ABS Warning Light Check
Follow procedure for RED BRAKE WARNING LIGHT CHECK. When ignition switch returns to RUN position from START position, Yellow ABS warning light should illuminate for 2 seconds, and then go out.
If warning light does not illuminate, go to YELLOW ABS WARNING LIGHT DOES NOT SELF-CHECK under SYMPTOM TESTS. If warning light remains on steady and does not flash, check for stored Diagnostic Trouble Codes (DTCs).

RED BRAKE WARNING LIGHT ON WITH IGNITION SWITCH ON
Turn ignition off. Release parking brake. Turn ignition on. If Red BRAKE warning light and Yellow ABS warning light remain illuminated after bulb check, retrieve RABS DTCs. If any DTCs are set, perform appropriate test for DTC retrieved. If Red BRAKE warning light and Yellow ABS warning light go out after bulb check, go to next step.
Turn ignition off. Disconnect parking brake switch connector. Turn ignition on. If Red BRAKE warning light illuminates, go to next step. If Red BRAKE warning light does not illuminate, replace parking brake switch. Recheck system operation.
Disconnect Daytime Running Lights (DRL) module or DRL jumper. Turn ignition on. If Red BRAKE warning light illuminates, go to next step. If Red BRAKE warning light does not illuminate, go to step 5.
Turn ignition off. Disconnect 10-pin instrument cluster connector. Using DVOM, measure resistance between instrument cluster connector terminal No. 5 (Violet/White wire) and ground. See WIRING DIAGRAMS. If resistance is greater than 10,000 ohms, repair instrument cluster printed circuit. Recheck system operation. If resistance is less than 10,000 ohms, repair Violet/White wire between instrument cluster and RABS diode. Recheck system operation.
Turn ignition off. Using DVOM, measure resistance between parking brake switch connector Light Green/Red wire terminal and ground. See WIRING DIAGRAMS. If resistance is greater than 10,000 ohms, replace Daytime Running Lights (DRL) module or DRL jumper. Recheck system operation. If resistance is less than 10,000 ohms, repair Light Green/Red wire between parking brake switch and DRL module or DRL jumper. Recheck system operation.

Dave H
Apr 28, 2009.