Turn Signal Switch - Momentary Loss of Ground
87chrysler6Models
1987-1/2 "S" With 2.5L or 3.0L Engine With Automatic Transmission and/or Speed Control
Subject
Intermittent DropOut of Speed Control or Torque Converter Lock-Up
Index
ELECTRICAL
Date
July 20, 1987
No..
08-18-87 (C21-08)
P-2596
SYMPTOM/CONDITION
Drop out of speed control and/or torque converter lock-up may occur with movement of the turn signal switch. Using the lane change function of the switch may produce this condition.
DIAGNOSIS
1. Remove the lower steering column cover and the hazard warning flasher.
2. Turn on the hazard flasher switch.
FIGURE 1:
3. Using a digital volt/ohmmeter set on the 1K ohm scale, measure the resistance between the D4 (18wt) circuit and a good body ground. The D4 (18wt) circuit can be found in the 6-way wiring connector to the stop lamp switch (Figure 1). The reading should be 0.33 K ohms +/- 0.03 K ohms.
NOTE: BEFORE MEASURING RESISTANCE WITH A DIGITAL VOLT/OHMMETER, A ZERO POINT MUST BE ESTABLISHED. THIS CAN BE ACCOMPLISHED BY CROSSING THE LEADS OF THE OHMMETER AND NOTING THE READING ON THE DIGITAL DISPLAY. THIS IS THE ZERO POINT. ALL READINGS SHOULD BE CALCULATED FROM THIS POINT.
4. If the reading is outside the specified range, proceed with the following repair procedure.
PARTS REQUIRED
1 Wiring Jumper Harness PN 4400850
REPAIR PROCEDURE
This procedure involves installing a resistor (jumper harness) in the D4 circuit. This prevents the SMEC from misinterpreting a momentary loss of ground, from movement of the turn signal switch, as a brake pedal application.
Two vehicle build conditions exist. Early build (before March 9, 1987) used a wiring jumper to add a 0.33 K ohm resistor from the D4 circuit to ground. After this point, the resistor was part of the instrument panel wiring harness.
NOTE: TO HELP IDENTIFY THE CONNECTORS ON THE VEHICLE, FOLLOW THIS GUIDE:
WIRE COLORS IN 6-WAY CONNECTOR PK, WT/PK, WT, YL/RD, DB/RD WIRE COLORS IN 4-WAY CONNECTOR BK, RD, TN, DG
FIGURE 1:
Vehicles Built Before March 9, 1987
1. Locate and replace the existing jumper harness. The jumper 6-way connectors plug in at the 6-way wiring connector of the stop lamp switch (Figure 1). The 4-way connectors plug in at the 4-way wiring connector for the power windows and door locks, located in the 25-way connector (Figure 1). On vehicles without power windows and door locks, the 4-way to body harness has no mate. Tape the jumper harness connector back to the harness. The 4-way to the instrument panel harness must be connected.
Vehicles Built After March 9, 1987
1. Separate the stop lamp switch 6-way connector (Figure 1).
2. Connect the 6-way connectors of the jumper harness to the separated 6-way connectors.
3. Separate the power window and door lock 4-way connector from the 25-way body connector (Figure 1).
4. Connect the 4-way connectors of the jumper harness to the 4-way connector of the instrument panel harness and, if the vehicle has power windows and door locks, to the 25-way connector of the body harness. If the vehicle is not equipped with power windows and locks, tape this connector back to harness.
POLICY: Reimbursable within the provisions of the warranty
TIME ALLOWANCE:
Labor Operation No. 08-19-01-90 . . . . . . . . . . . . 0.3 Hrs.
FAILURE CODE: 85 - Improperly Installed Wiring