Erratic Relay and/or Lighting Operation
Bulletin 86-8-17Date Dec. '86
Ref. No. 86-191-8
SUBJECT: ERRATIC RELAY AND/OR LIGHTING OPERATION, POSSIBLY SETTING CODES B334, B335, B336, B337, B446, B447, B448, B660, OR B663
MODELS AFFECTED: 1986 RIVIERA
FIGURE 1 - BCM PROM:
Some 1986 Rivieras may experience erratic relay operation and/or flashing interior and exterior lighting with the ignition in the "run" position possibly accompanied by codes B334, B335, B336, B337, B446, B448, B660 or B663. This condition may be caused by an inoperative BCM EPROM. BCM EPROM's that may cause this condition can be identified by the manufacturer's Code, 014, on the PROM (See Figure 1) and may have a white stripe.
To correct this condition, replace the BCM EPROM with Part No. 16066237, available from GM Service Parts Organization. Check replacement PROM's to be sure that they do not have a white stripe or a manufacturer's Code 014. These PROM's have been purged from GMSPO stock.
WARRANTY INFORMATION
Labor Operation: T5130
Labor Time: 0.8 hours
Trouble Code: 92