Testing for Electrical Intermittents for Chevrolet Camaro 2001
Perform the following procedures while wiggling the harness
from side to side. Continue this at convenient points (about 6 inches apart)
while watching the test equipment.
If the fault is not identified, perform the procedure below using the
MIN MAX feature on the DMM. This feature allows you to manipulate the circuit
without having to watch the DMM. The DMM will generate an audible tone when
a change is detected.
Important: The J 39200
must
be used in order to perform the following procedure since the J 39200
can monitor current, resistance or
voltage while recording the minimum (MIN), and maximum (MAX) values measured.
- Connect the DMM to both sides of a suspected connector (still
connected), or from one end of a suspected circuit to the other.
Refer to
Troubleshooting with a Digital Multimeter
for information on connecting the DMM to the circuit.
- Set the rotary dial of the DMM to the V (AC) or V (DC) position.
- Press the range button of the DMM in order to select the desired
voltage range.
- Press the MIN MAX button of the DMM. The DMM displays 100 ms
RECORD and emits an audible tone (beep).
Important: The 100 ms RECORD mode is the length of time an input must stay at a
new value in order to record the full change.
- Simulate the condition that is potentially causing the intermittent
connection, either by wiggling the connections or the wiring, test driving,
or performing other operations. Refer to
Inducing Intermittent Fault Conditions
.
- Listen for the audible Min Max Alert which indicates that a new
minimum or maximum value has been recorded.
- Press the MIN MAX button once in order to display the MAX value
and note the value.
- Press the MIN MAX button again in order to display the MIN value
and note the value.
- Determine the difference between the MIN and MAX values.
| • | If the variation between the recorded MIN and MAX voltage values
is 1 volt or greater an intermittent open or high resistance condition
exists. Repair the condition as necessary. |
| • | If the variation between the recorded MIN and MAX voltage values
is less than 1 volt an intermittent open or high resistance condition
does not exist. |