Question about 2004 Ford F150
Sounds like the shift interlock circuit has an issue.
This can be 1 of 3 places
1. The fuse for the Shift Interlock circuit. This is fuse #16
2. The shift interlock switch. This is part of the BPP ( Brake Pedal Position ) Switch that also controls the brake lamps. There are 2 switches in the BPP switch, 1 for the shift interlock, the other the brakes. The circuit in the BPP switch for the shift interlock is the Tan w/ Red stripe wire ( from fuse # 16 ) to Pink w/ Light Green stripe ( to the shift interlock solenoid ).
Test both side of this circuit with a meter ( to ground ) you should have power on the Tan w/ Red stripe wire any time the key is in the Start or Run position.
The Pink w/ Light Green stripe wire should have power any time the brake pedal is pressed down.
If you do not have power at the Pink w/ Light Green stripe wire, you need a new BPP switch.
If you have power with the brake pedal pressed on this wire, you need a new Shift Interlock Solenoid.
Posted on Jul 07, 2010
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Posted on Jan 02, 2017
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