Crown Victoria V8-4.6L SOHC VIN 6 (1996)
BA7 - Test Stoplight Switch Input
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Using a voltmeter, test for voltage at circuit 10 (LG/R) to stoplight switch.
Is B+ present?
YES
GO to BA8.
NO
SERVICE circuit 10 (LG/R) to stoplight switch. RETEST system.
BA8 - Test Stoplight Switch Output
-
Using a voltmeter, test for voltage at output of stoplight switch circuit 511 (LG).
-
Press stoplight switch.
Is voltage reading B+ at the switch?
YES
SERVICE Circuit 511 (LG). RETEST system.
NO
REPLACE stoplight switch. RETEST system.
BB - Stoplamps/Rear-Mount Lamps on Continuously
Pinpoint Test BB: Stoplamps/Rear-Mount Lamps On Continuously
BB1 - Check Stoplamp Switch Operation
NOTE: Verify stoplight switch is adjusted properly.
-
Press brake pedal two or three times while observing stoplight switch operation.
Did stoplight switch operate properly?
YES
GO to BB2.
NO
REPLACE damaged stoplight switch. RESTORE vehicle. RETEST system.
BB2 - Check Circuit 511 (LG)
-
Disconnect stoplight switch and observe stoplamps.
Did stoplamps turn off?
YES
REPLACE damaged stoplight switch. RESTORE vehicle. RETEST system.
NO
SERVICE circuit 511 (LG) for short to B+. RESTORE vehicle. RETEST system.