11
Test Procedures
TROUBLESHOOTING AND ELECTRICAL SYSTEM
TEST PROCEDURE 2 – Fuse
See General Warning on page 10-1.
The fuse (red 10-amp) is located in the electrical component box.
1.
Disconnect battery.
See Disconnecting the Battery – Gasoline Vehicles, Section 10, Page 10-2.
2.
Remove the cover from the electrical component box.
3.
Ensure that wires are connected correctly and are tight. If they are not, rewire or tighten as necessary.
4.
Remove fuse to be tested from the fuse block.
See Fuse Removal on page 12-18.
The red 10-amp fuse
protects the solenoid for the starter (cranking) circuit. The 20-amp fuse at the yellow wire connection protects the
headlights and brake lights (if equipped). The fuse at the red/white wire connection protects the horn.
5.
Connect the probes of a multimeter, set to 200 ohms, to the fuse terminals. The reading should be continuity. If
there is no continuity, determine and repair the cause of the fuse failure. Replace the fuse with a properly
rated new one.
6.
Connect battery.
See Connecting the Battery – Gasoline Vehicles, Section 10, Page 10-3.
TEST PROCEDURE 3 – Ground Cables
See General Warning on page 10-1.
1.
Disconnect battery and spark plug wire(s).
See Disconnecting the Battery – Gasoline Vehicles, Section 10,
2.
Check the starter/generator ground cable.
2.1. Set the multimeter to 200 ohms. Place the red (+) probe on the (A2) terminal of the starter/generator
and place the black (–) probe on the vehicle frame
. The reading should be
continuity. If the reading is incorrect, clean and tighten cable connections. If the connections are good and
the reading is incorrect, repair or replace the cable.
3.
Check the engine ground cable.
3.1. Place the red (+) probe of the multimeter on the ground cable terminal end located on the oil filler bracket
on the engine
. Place the black (–) probe on the vehicle frame. The reading
should be continuity. If the reading is incorrect, clean and tighten cable connections. If the connections are
good and the reading is incorrect, repair or replace the cable.
F2
1
2
1. Ground to Chassis 2. A2 Terminal
00
00
Place test probes at each end of ground cable.
Figure 11-13
Starter/Generator Ground Cable Test
Figure 11-14
Engine Ground Cable Test
4.
Check voltage regulator ground connection (at battery frame ground). Make sure it is clean and tight.
5.
Check the battery ground cable.
5.1. A 6-gauge black cable connects the negative (–) battery post to the frame. The frame connection should
be clean and tight. Visual inspection of the connection on the frame is very difficult. The best check for
Page 11-20
2009 FE 350 Maintenance and Service Supplement
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