Radio Controls - Blank/Inoperative When Cold

91cadillac04

Bulletin No.: T-91-77
File in Group: 9
Number: 77
Corp. Ref. No.: 119009
Date: April, 1991


SUBJECT:
RADIO CONTROLS INOPERATIVE OR DISPLAY BLANK WHEN COLD
(EXCHANGE RADIO CONTROL HEAD)

MODELS AFFECTED:
1990-1991 BROUGHAMS


Some 1990-1991 Broughams equipped with the base or uplevel radio system (RPO's UX1 or U1H) may experience a condition where the radio display will be blank or controls inoperative when ambient temperatures are below 40~ F (5~ C). If the TECH1 is used for diagnosis when the condition is present, the remote radio receiver chassis will play and respond normally to TECH1 commands. Depressing the volume control knob to display the time will normally return the system to proper operation.

This condition may be caused by software contained in the radio control head. Revised radio control head software has been developed, and the control head may be exchanged or repaired for this condition at an AC-Delco radio repair shop following the procedure listed in DSIB 91-I-1.

For warranty purposes use Labor Operation R0765 at .2 hour.