Ford Ranger 2007 Workshop Manual

2007 Ranger Workshop Manual
SECTION 417-01: Exterior Lighting
DIAGNOSIS AND TESTING

Turn Signal and Hazard Lamps

Special Tool(s)
73III Automotive Meter
105-R0057 or equivalent
Flex Probe Kit
105-R025C or equivalent

Principles of Operation

NOTE: The smart junction box (SJB) is also known as the generic electronic module (GEM).
Turn Signal Lamps
Voltage is supplied by the SJB to the indicator flasher relay when the ignition switch is in the RUN position. When the multifunction switch is placed in the LH or RH TURN position, voltage
is routed to the multifunction switch, which then routes the voltage to the turn lamps. The electronic flasher relay then cycles the voltage on and off approximately 80 times per minute. If a
front or rear turn bulb is inoperative, the electronic flasher relay cycles the voltage on and off approximately 160 times per minute.
Hazard Lamps
Voltage is supplied by the SJB to the indicator flasher relay at all times. When the hazard switch is engaged, voltage is routed to the multifunction switch, which then routes the voltage to all
the turn lamps.

Inspection and Verification

1. Verify the customer concern.
2. Visually inspect the following for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Multifunction switch Smart junction box (SJB) fuse(s):
17 (15A) (hazard lamps)
20 (10A) (turn lamps)
Indicator flasher relay
Circuitry
SJB
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom. GO to

Symptom Chart

Symptom Chart
Condition
The turn signal lamps are inoperative
The turn signal lamps are always on
One turn signal/hazard lamp is
inoperative/always on
The hazard lamps are inoperative
The hazard lamps are always on
Pinpoint Tests
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS7L/~MUS~LEN/20/S...
Printable View (206 KB)
Electrical
Symptom Chart.
Possible Sources
Fuse
Circuitry
Indicator flasher relay
Multifunction switch
Smart junction box
(SJB)
Multifunction switch
Circuitry
Multifunction switch
Fuse
Circuitry
Indicator flasher relay
Multifunction switch
SJB
Multifunction switch
Action
GO to Pinpoint Test I.
INSTALL a new multifunction switch. REFER to
system for normal operation.
GO to Pinpoint Test J.
GO to Pinpoint Test K.
INSTALL a new multifunction switch. REFER to
system for normal operation.
Page 1 of 7
2007 Ranger Workshop Manual
Procedure revision date: 09/21/2007
Section 211-05. TEST the
Section 211-05. TEST the
6/20/2011