Article 1992 - Starter System - Diagnosis and Repair

TSB #126 - November 7, 1969
(All Car Lines Except Thunderbird Built After 1967)

(Supersedes Article 1318, TSB No. 87, dated March 8, 1968)

Because of a high percentage on starter drives returned with no defect it is evident that other starting system malfunctions are being corrected through drive replacement. A positive test has been devised to determine if the starter drive is at fault. If the drive is not at fault, a diagnostic procedure is provided to assist in making proper repairs.

The following steps are keyed to customer complaints.

If the complaint is "starter will not crank engine - nothing happens", refer to Chart I.

If the complaint is "starter will not crank at times - "intermittent)", determine if possible what is meant by this. Does the starter spin and not crank the engine? If the answer is "no, the starter doesn't spin", then the fault will be something other than the starter drive. If the answer is "Yes, the starter does spin", then the problem may be a slipping starter drive. Refer to Chart II.

If the complaint is of an intermittent condition and the drive assembly is thought to be the cause, check the starter drive reclutch action as follows:
    1. Start the engine and set engine idle at between 900 and 1000 rpm with the hot idle adjusting screw.
    2. Shut engine off and connect remote control starter switch in the primary ignition circuit as shown in Fig. 2.
    3. Depress remote control starter switch and turn ignition key to start position. As soon as the engine begins to run, let up on remote-control starter switch while holding the ignition key in the start position. Do not depress accelerator pedal during above procedure. Letting up on the remote control starter switch "kills" the ignition and the "dead" engine should now be cranked by the starter.
    4. Observe to see if the starter begins to crank the dead engine and continues to crank the engine until the ignition key is released from the start position. If the starter does not crank the dead engine, the drive assembly is slipping.
    5. Repeat test at least five time in succession to ensure detection of intermittent failures.

The circled numbers on the Diagnosis chart indicated the suffix of the operation number of the work performed at that point on the chart. The standard time for the various operations are listed below each applicable suffix following WARRANTY STATUS.


Chart IChart II

PARTS: See Diagnosis Chart.
WARRANTY STATUS: Reimbursable within the provision of the Warranty & Policy manual.
Operation: SP-11000-B-69 - Time: in hours -

(This article supersedes Article 1318, TSB No. 87, dated March 8, 1968)