(2)  
Set the DISPLAY SELECT on the test unit to RES.

 (3)  
Set the RESISTANCE FUNCTION switch to EXT RES.

 (4)  
Set the power switch to ON.

 S 736-008-001
 S 736-009-001
 S 736-010-001
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 AIRPLANES WITHOUT ISOLATED FUEL QUANTITY ú  28-41-91
 TRANSMITTER (IFQT)  ú  CONFIG  1
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL 
ASEE BUSSING PLUG CENTER TANK 
ASEE NO. 2 TANK BUSSING PLUG  BSEE 1 BUSSING PLUG AUXILIARY TANK 
ASEE NO. 1 TANK BUSSING PLUG 

BULKHEAD ELECTRICAL CONNECTOR
RECEPTACLE FOR THE FUEL TANK
BUSSING PLUG
BUSSING PLUG
FUEL TANKBUSSING
(FRONT SPAR SHOWN; ALMOST
RECEPTACLEPLUG
THE SAME FOR THE REAR SPAR) AUXILIARY TANK BUSSING PLUG
A
1 AIRPLANES WITH AN B
1
AUXILIARY FUEL TANK
Bussing Plug Locations
Figure 601

M46327
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 (5)  S 736-011-001Touch the probes to each of these locations and make sure the resistance is more than the applicable minimum value: (a) Touch the probes to each of these locations and make sure the resistance is more than the applicable minimum value:
 NOTE:____ Change the position of the probes if the resistance value is less than the minimum value. If you cannot get a resistance that is more than the minimum value, the circuit is bad.
 ~............................................................ | LEAD 1 | LEAD 2 | MINIMUM RESISTANCE | .............................................................. | Pin 1 of receptacle | Shield of pin 1 | 1 megohm | .............................................................. | Pin 2 of receptacle | Shield of pin 1 | 1 megohm | .............................................................. | Pin 3 of receptacle | Shield of pin 1 | 1 megohm | .............................................................. | Shield of Pin 1 | Airplane ground | 10 megohms | 2.....................….................…....................1
 (6)  S 766-012-001Set the RESISTANCE FUNCTION knob on the system tester to AB to measure the resistance between pin 1 (COAX, Hi Z) and pin 2 (Tank Unit, Lo Z).
 (7)  S 766-013-001Make sure the resistance is more than 250 megohms.
 (8)  S 766-014-001Move the system tester switch to measure the resistance between the subsequent pin numbers or conductors. (a) Make sure the minimum resistance agrees with the values shown in this table:

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 ~..............................................................
 | SYSTEM TESTER SWITCH POSITION | MINIMUM RESISTANCE |
 | | Megohms |
 ................................................................
 | A - GND (Hi Z to Airplane Ground) | 10 |
 | B - GND (Tank Unit Lo Z to Airplane | 10 |
 | Ground) | |
 | C - GND (Compensator Lo Z to | 10 |
 | Airplane Ground) | |
 | A - C (Hi Z to COMP Lo Z) | 250 |
 2.......................................…......................1
　
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