Grand Marquis V8-281 4.6L SOHC (1992)
Blower Motor Switch: All Technical Service Bulletins
ATC System - Erratic Operation
Article No. 91-16-8
08/07/91
AIR CONDITIONING - ATC - BLAST OF COLD AIR
FOLLOWED BY HOT AIR
FORD:
1992 CROWN VICTORIA
LINCOLN-MERCURY: 1992 GRAND MARQUIS
ISSUE:
The Automatic Temperature Control (ATC) may blast 10 to 15 seconds of cold air followed by 10 to 15 seconds of hot air after engine
ignition. This is caused by incorrect wiring of pin 10 on the 14401 wire assembly connection to the ATC blower motor switch on the control
assembly.
ACTION:
Modity the wiring of pin 10 on the connector and install a new wire assembly A/C jumper (F2AZ-19D887-A). Refer to the following
procedure for service details.
Figure 1
1.
Disconnect the battery.
2.
Remove the ATC control assembly as shown on pages 12-03-4 and 12-03-5 of the 1992 Crown Victoria/Grand Marquis Shop Manual.
3.
Locate the blower motor switch connector and cigar lighter battery feed wire (16 gauge, lt. blue/white), Figure 1.
