Ford 2003 Mustang Workshop Manual page 3474

Is the resistance less than 5 ohms?
PINPOINT TEST T: THE REVERSING LAMPS ARE ON
CONTINUOUSLY
Test Step
T1 CHECK THE CONTINUITY OF THE
DTR SENSOR (A/T) OR THE
REVERSING LAMP SWITCH (M/T)
Key in OFF position.
Disconnect: DTR Sensor C167
(A/T).
Disconnect: Reversing Lamp Switch
C169 (M/T).
Set the parking brake.
Key in ON position.
Select REVERSE.
Are the reversing lamps
illuminated?
Result / Action to Take
Yes
REPAIR Circuit 140 (BK/PK) for short to battery.
TEST the system for normal operation.
No
INSTALL a new DTR sensor (A/T) or reversing lamp
switch (M/T); REFER to
308-03A , or Section 308-03B
normal operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
Section 307-01 , Section
. TEST the system for