Mechanics

F150 TRUCK WON'T SHIFT OUT OF PARK.

2002 Ford F-150

Transmission problem
2002 Ford F150 V8 Four Wheel Drive Automatic 125000 miles

My truck won't shift out of park. When brake is pushed, gear shift handle doesn't want to come back all the way to enable it to shift into a gear. It's never done it before. Gear lever is not loose.
Avatar
Redskinsfan34
November 19, 2008.




PINPOINT TEST A (F150 PICKUP)

Possible Cause
Brake Pedal Position (BPP) switch.
Loose or damaged connections.
Open fuses.
Shift interlock actuator.

Diagnostic Procedure
Apply the brake pedal and view brakelights. Do the brakelights illuminate? If so, go to step 7. If not, go to next step.
Ensure ignition switch is in OFF position. Measure resistance in fuse No. 15 (5-amp). Is the resistance 5 ohms or less? If so, go to step 4. If not, go to next step.
Disconnect Brake Pedal Position (BPP) switch harness connector. Measure the resistance between BPP switch harness connector terminal No. 3 and ground. Is the resistance 10 k/ohms or less? If so, repair short to ground in White/Yellow wire and test the system for normal operation. If not, go to next step.
Measure the resistance between output side of fuse No. 15 (5-amp) and the BPP switch harness connector terminal No. 3. See Fig. 53. Is the resistance 5 ohms or less? If so, go to next step. If not, repair open in White/Yellow wire and test the system for normal operation.
Measure the resistance of the BPP switch while open (OFF) and closed (ON). See Fig. 55. Is the resistance of switch greater than 10 k/ohms while OFF, and 5 ohms or less while ON? If so, go to next step. If not, replace BPP switch. See BRAKE PEDAL POSITION SWITCH under REMOVAL & INSTALLATION. After repairs, test the system for normal operation.
Measure the resistance between BPP switch harness connector terminal No. 1 and ground. See Fig. 16. Is the resistance 10 k/ohms or less? If so, repair short to ground in Red/Light Green wire and test the system for normal operation. If not, go to next step.
Measure the resistance between the shift interlock actuator harness connector terminal No. 1 and the BPP switch harness connector terminal No. 2. See Fig. 54. Is the resistance 5 ohms or less? If so, go to next step. If not, repair open in Red/Light Green wire and test the system for normal operation.
Measure the voltage between shift interlock actuator harness connector terminal No. 3 and ground. See Fig. 18. Does battery voltage exist? If so, go to step 12. If not, go to next step.
Measure resistance in fuse No. 6 (5-amp). Is the resistance 5 ohms or less? If so, go to step 11. If not, go to next step.
Measure the resistance between shift interlock actuator harness connector terminal No. 3 and ground. See Fig. 19. Is the resistance 10 k/ohms or less? If so, repair short to ground in Gray/Yellow wire and test the system for normal operation. If not, go to next step.
Measure the resistance between output side of fuse No. 6 (5-amp) and the shift interlock actuator harness connector terminal No. 3. See Fig. 56. Is the resistance 5 ohms or less? If so, go to next step. If not, repair open in Gray/Yellow wire and test the system for normal operation.
Measure the resistance between the shift interlock actuator harness connector terminal No. 2 and ground. See Fig. 12. Is the resistance 5 ohms or less? If so, replace shift interlock actuator and test the system for normal operation. See SHIFT INTERLOCK ACTUATOR under REMOVAL & INSTALLATION. If not, repair open in Black wire and test the system for normal operation.

Dave H
Nov 19, 2008.
Fuse # 15 was blown. Replaced it and everything was fine for 30 seconds then it blew again. The dome light is also run off that fuse. Could that be the problem? We also had a quick freeze here the other night and it was the next morning when the provlem started. Possibly ice somewhere it shouldn't be?
AD

Tiny
Redskinsfan34
Nov 20, 2008.
Could be ice formed on dome light wiring somewhere but according to my fuse box diagram the fuse F2.15 has GEM, brake pressure switch and brake pedal position switch. Is more likely a damaged/broken wire on pedal circuit? Or damaged switch?

Dave H
Nov 20, 2008.
Dave H - you know your stuff! You hit this right on the head - The dome lights (reading lights as listed in the owner's manual) are tied into fuse #15 (5 Amp)(under steering wheel). If the the interior lights don't work as the is opened, something is shorted or fuse is blown. If you are in a remote location you can barely actuated the key and get it to shift into neutral to start it and get you mobile to an auto parts store.

Thanks Dave - this happened on a cold, rainy day, at a remote site in East Texas Swamps and you got me running in under a minute.

Tiny
Senor Mule
Nov 30, 2008.
No problem. Anytime, that's what we are here for. Anytime we can help in the future. Just post

happy motoring

Dave H

Dave H
Nov 30, 2008.

AD