Mechanics

GEAR SHIFT SWITCH

1999 Ford Escort

Electrical problem
1999 Ford Escort

My car will not go into gear when the brake is depressed. This has happened a few times in the past, but it always eventually went into gear. It will no longer go into gear. I pulled the two switches attached to the brake pedal, one has power and the other doesn't. I assume the one without power is for the cruise control shut off. Both switches appear to be operative (both have continuity when depressed). I took the console mounted gear shifter handle apart and all appears to be in fine operating shape. I don't know where the other end of the switch terminates at the transmission. Does this sound like an electrical problem or a problem in the transmission itself?
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Majel
January 17, 2010.



System is a 2-function electro/mechanical system which prevents free movement of the shift lever. On models with column shift, a shift lock actuator is mounted on the steering column. On models with floor mounted shift lever, a shift lock actuator is mounted on the ignition switch end of the interlock cable. This actuator prevents the ignition switch from being turned to LOCK position unless shift lever is in " P" position. Shift lever may not be moved from " P" position if the ignition key is in the RUN position unless the brake pedal is depressed.
On Escort, Escort ZX2, Tracer and Villager, a cable system between ignition switch and shift lever prevents ignition key from being removed from switch unless shift lever is in " P" position.
An electronic shift lock actuator, mounted at the base of the shift lever, locks shift lever in " P" position until ignition switch is in RUN position and brake pedal is depressed.

Check Brakelight Operation

1. Depress brake pedal. If brakelights illuminate, go to step 7. If brakelights do not illuminate, go to next step.
Check Fuse No. 32 (15-Amp)

2. Check fuse No. 32 located in the interior fuse panel. See WIRING DIAGRAMS. If fuse is okay, go to step 4. If fuse is blown, go to next step.
Check Wire To BPP Switch For Short To Ground

3. Turn ignition off. Disconnect BPP switch connector. Using DVOM, measure resistance of wire between BPP switch harness connector terminal (Light Green/Red wire) and ground. If resistance is more 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair wire between fuse panel and BPP switch for short to ground. Reconnect all connectors and retest system.
Check Wire To BPP Switch For Open

4. Using DVOM, measure resistance of wire between fuse No. 32 output terminal and BPP switch harness connector terminal (Light Green/Red wire). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Light Green/Red wire between fuse panel and BPP switch. Reconnect all connectors and retest system.
Check BPP Switch

5. Using DVOM, measure resistance between both BPP switch terminals. Apply brakes and recheck resistance. Resistance should be more than 10 k/ohms without brake pedal applied and less than 5 ohms with brake pedal applied. If switch operates as specified, go to next step. If switch does not operate as specified, replace BPP switch and retest system.
Check Wire To Shift Interlock Actuator For Short To Ground

6. Disconnect shift lock actuator connector. Using DVOM, measure resistance between shift lock actuator harness connector terminal (Light Green wire) and ground. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short in Light Green wire between BPP switch connector and shift lock actuator connector. Reconnect all connectors and retest system.
Check Wire To Shift Interlock Actuator For Open

7. Using DVOM, measure resistance of Light Green wire between BPP switch connector and shift lock actuator connector. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Light Green wire between BPP switch connector and shift lock actuator connector. Reconnect all connectors and retest system.
Check Voltage To Shift Interlock Actuator

8. Turn ignition on. Using DVOM, measure voltage between shift lock actuator harness connector terminal (Purple/Orange wire on 5-passenger car and Light Green/Purple wire on 6-passenger car) and ground. If battery voltage is present, go to step 12. If battery voltage is not present, go to next step.
Check 10-Amp Fuse No. 28

9. Turn ignition off. Remove and check fuse No. 28. See WIRING DIAGRAMS. If fuse is okay, go to step 11. If fuse is blown, go to next step.
Check Wire To Shift Interlock Actuator For Short To Ground

10. Using DVOM, measure resistance between shift lock actuator harness connector terminal (Purple/Orange wire on 5-passenger car and Light Green/Purple wire on 6-passenger car) and ground. If resistance is more than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair open in Purple/Orange wire on 5-passenger car or Light Green/Purple wire on 6-passenger car, between fuse No. 28 and shift lock actuator harness connector. Reconnect all connectors and retest system.
Check Wire To Shift Interlock For Open

11. Using DVOM, measure resistance of Purple/Orange wire on 5-passenger car and Light Green/Purple wire on 6-passenger car, between fuse No. 28 output terminal and shift lock actuator connector terminal. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Purple/Orange wire on 5-passenger car and Light Green/Purple wire on 6-passenger car, between fuse No. 28 and shift lock actuator harness connector. Reconnect all connectors and retest system.
Check Shift Interlock Actuator Ground For Open

12. Ensure ignition is off. Using DVOM, measure resistance between shift lock actuator harness connector Black wire and ground. If resistance is less than 5 ohms, replace shift lock actuator. Reconnect all connectors and retest system. If resistance is more than 5 ohms, repair open in Black wire between shift lock actuator connector and ground.

Emergency Override Function (Escort, Escort ZX2 & Tracer)
Ensure shift lever is locked in Park.
Use a screwdriver to lift small access cover at upper right corner of shift bezel.
Insert a screwdriver vertically into access hole and push downward to release lock lever.
Ensure shift lever is released from Park.

BMRFIXIT
Jan 17, 2010.


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