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Check Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2006 Subaru Outback and 2006 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
POWER SUPPLY AND GROUND CIRCUIT CHECKING PROCEDURE CHART

Step Check Yes No
1 CHECK POWER SUPPLY. 
  1. Disconnect the harness connector of body integrated unit.
  2. Measure the voltage between harness connector terminal and chassis ground.

    Connector & terminal 

    (i84) No. 34 (+) - Chassis ground (-): 

    (B281) No. 2 (+) - Chassis ground (-): 

 Is the voltage more than 10 V? Go to step 2.  Check the harness for open or short circuit between body integrated unit and fuse.
2 CHECK GROUND CIRCUIT. 
Measure the resistance between harness connector terminal and chassis ground.
Connector & terminal 
(B280) No. 22 - Chassis ground: 
(B281) No. 8,9 - Chassis ground: 		 Is the resistance less than 10 Ω? The power supply and ground circuit are OK. Repair the harness.
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