Lntermittents And Poor Connections Diagnosis - GMC Chevrolet Camaro 1998 Service Manual

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Body and Accessories
Repair and Verify Fix
From isolating the root cause, basically the problem
has been diagnosed. Using the Component Location
Table and the corresponding figure, quickly find
C100 and the LT GRN wire, locate the exact trouble
point and make the repair.
!
Hot At All Times (
Wiring Systems 8~297
Check the thoroughness of the repair by performing a
final system check on the headlamp circuit. This of
course means making sure that both high beams, both
low beams, and the high beam indicator are working.
r.
1 Circuit Breaker
s \ , Headlamp
I I
Switch
I --------------- I
I
Headt_ •• Off Head Off
I
~
~· 1. -~·~;~ - - - - -
~~~
- -
~
1 YELI10
Headlamp
Dimmer
Switch
1 TAN 12
1 LT GRN 11
DI
B
1E
----?~
CtOO
lntermittents and Poor Connections
Diagnosis
Most intermittents are caused by faulty electrical
connections or wiring. Inspect for the following items:
• Wiring broken inside the insulation.
• Poor connection between the male and female
terminal at a connector. Refer to Testing for
Proper Terminal Contact below for the specific
procedure.
• Poor terminal to wire connection. Some conditions
which fall under this description are poor crimps,
poor solder joints, crimping over wire the
insulation rather than the wire itself and corrosion
in the wire to terminal contact area, etc.
• Wire insulation which is rubbed through. This
causes an intermittent short as the bare area
touches other wiring or parts of the vehicle.
• Refer to Testing for Electrical lntermittents for test
procedures to detect intermittent open, high
resistance, short to ground, and short to voltage
conditions.
- - - - - - , Instrument
:cluster
High Beam I
~
....
Indicator I
~
~o
L - - - _, - - - - ..I
.88~1150
Ill- - - -
S205
3 BLK 15Q
..,,. G200
61699
Testing for Proper Terminal Contact
It is important to test terminal contact at the component
and any in-line connectors before replacing a
suspect component. Mating terminals must be
inspected to ensure good terminal contact. A poor
connection between the make and female terminal at
a connector may be the result of contamination or
deformation.
Contamination may be caused by the connector
halves being improperly connected. A missing or
damaged connector seal, damage to the connector
itself, or exposing the terminals to moisture and
dirt can also cause contamination. Contamination,
usually in the underhood or underbody connectors,
leads to terminal corrosion, causing an open circuit or
intermittently open circuit.
Deformation is caused by probing the mating side of a
connector terminal without the proper adapter,
improperly joining the connector halves, or repeatedly
separating and joining the connector halves.
Deformation, usually to the female terminal contact
tang, can result in poor terminal contact causing
an open or intermittently open circuit.