61-101-00802.EF2 (REV. G) CH. 2
January 7, 2015 Page 29 of 44
7. SYSTEM WIRING INTEGRITY TEST
Note: Refer to PRECAUTIONS and PRELIMINARY sections (Chapter 1).
Note: Insure that the Insulation, Capacitance, Indicator test and Preferred
Calibration have all been accomplished with satisfactory results and that the
tanks are still dry prior to attempting this test.
This test is used to determine whether there exists an inline (series) resistance
problem in the aircraft wiring. It will be accomplished by a comparison of the aircraft
empty probes capacitance versus a simulated capacitance from the Test Set to
drive the cockpit indicator to the same point. No adjustment of the Indicator should
be made during this test or based on the outcome of this test. If repairs are made to
the harness following this test, then the Preferred Calibration must be repeated and
subsequently this integrity test.
A. Aircraft Preparation
(1) Disconnect aircraft battery.
Caution: When lowering or raising the fuel panel, ensure aircraft battery
is disconnected.
(2) Access the indicator.
(3) Open the circuit breakers.
(4) Disconnect the aircraft wiring plug located at the indicator.
B. Test Set Preparation
(1) Set the test set ON / OFF switch to OFF.
(2) Rotate the TEST FUNCTION switch to PROBE(S).
(3) Set the INSULATION / SYSTEM switch to SYSTEM.
(4) Set the MAIN / TOT-AUX / NAC switch to MAIN / TOT.
(5) Set the 200 (pF)
/ 1000 (pF) switch to 200 (pF).
C. Connecting Test Set
(1) Connect the test set as shown in either Figure 3 or 4. Figure 3
depicts using Adapter Cable 101-00831 for conversion to systems
with circular style connectors.
(2) Connect the test set ACFT connector to the aircraft wiring plug
removed from indicator.
(3) Do not connect the test set IND connector.
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