Possible Causes

When the TCS switch is depressed and the transmission will not disengage or engage the overdrive function, the possible causes are:

• Blown fuse
• Short to ground
• Short to open
• Faulty switch
• Wiring, terminals or connectors
  Fig 1: Pinpoint Test I: Transmission Control Switch (TCS) Is Not Operating Correctly (Steps I1-I4)

  Courtesy of FORD MOTOR CO.

Fig 2: Pinpoint Test I: Transmission Control Switch (TCS) Is Not Operating Correctly (Step I5)

Courtesy of FORD MOTOR CO.