Backup Lamp Switch: Service and Repair

Fig. 8 Back up lamp/neutral safety switch installation:

REMOVAL
1. Remove nut securing shift lever to transaxle and disconnect lever from shaft.
2. Release ``T'' latch and disconnect electrical connector from switch.
3. Remove switch mounting bolts and the switch, Fig. 8.

INSTALLATION

New Switch
New switch is pinned in position to provide correct adjustment. If pin is missing or has been broken by rotating switch, follow procedure for installation and adjustment of used switch.
1. Rotate shift shaft to neutral position.
2. Align flats on switch with flats on shaft, then install switch.
3. Install and tighten mounting bolts. Do not rotate switch if bolts will not align with case mounting boss, ensure shift shaft is in neutral position. If shaft is properly positioned but bolts still do not line-up with mounting boss, refer to procedure for old switch.
4. Install shift lever and reconnect electrical connector to switch.
5. Ensure engine will only start with selector in ``Park'' and ``Neutral'' positions and verify proper operation of back up lamps.

Fig. 8 Back up lamp/neutral safety switch installation:

Used Switch
1. Rotate shift shaft to neutral position.
2. Align flats on switch with flats on shaft, then install switch.
3. Install mounting bolts, leaving switch free to rotate.
4. Insert 3/32 inch gauge pin into service adjustment hole, Fig. 8.
5. Rotate switch until gauge pin can be pressed into a depth of 15/32 inch on 1986 models, or 9/64 inch on 1987---88 models, then secure switch position by tightening switch mounting bolts.
6. Remove gauge pin, install shift lever and reconnect electrical connector to switch.
7. Ensure engine will only start with selector in ``Park'' and ``Neutral'' positions and verify proper operation of back up lamps.

ADJUSTMENT
1. Position transaxle shifter assembly in ``neutral'' notch in detent plate, then loosen switch attaching screws.
2. Rotate switch on shifter assembly until adjustment hole aligns with carrier tang hole.
3. Insert 3/32 inch gauge pin into adjustment hole to a depth of 5/8 inch on 1987---88 Riviera and Toronado, or 15/32 inch on all other models.
4. Tighten switch mounting bolts, then remove gauge pin.