709 / 1526
59
ELECTRICALS
l
Do not use wires or harnesses with a broken
insulation.
Repair by wrapping with protective tape or
replace with new ones if necessary.
l
After installing parts, make sure that wire
harnesses are not pinched.
l
After routing, check that the wire harnesses
are not twisted or kinked.
l
Wire harnesses should be routed so that they
are not pulled or slackened excessively,
pinched or interfering with adjacent or
surrounding parts in all steering positions.
l
When using the Service Tester, follow the
manufacturers instructions.
l
Always insert the probe of the tester from
the wire harness side.
l
Make sure to use the probe with a tapered
tip.
l
Do not drop parts.
GUIDELINES
l
Verify the Complaint.
Turn on all the components in the problem
circuit to check the accuracy of the customer
complaint. Note the symptoms. Do not begin
disassembly or testing until you have
narrowed down the problem area.
l
Analyze the Schematic
Look up the schematic for the problem circuit.
Determine how the circuit is supposed to
work by tracing the current paths from the
power feed through the circuit components
to ground. If several circuit fail at the same
time, the fuse or ground is a likely cause.
Based on the symptoms and your
understanding of the circuit operation, identify
one or more possible causes of the problem.
l
Isolate the Problem by Testing the Circuit.
Make circuit tests to check the diagnosis you
made as above. Keep in mind that a logical,
simple procedure is the key to efficient
troubleshooting. Test for the most likely cause
of failure first. Try to make tests at points that
are easily accessible.
l
Fix the Problems
Once the specific problem is identified, make
the repair. Be sure to use proper tools and
safe procedures.
l
Make Sure the Circuit Works
Turn on all components in the repaired circuit
in all modes to make sure you have fixed
the entire problem. If the problem was a
blown fuse, be sure to test all of the circuits
on that fuse. Make sure no new problem turn
up and the original problem does not recur.