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Subaru Impreza Electrical/Lighting Questions

30 messages,  Last post on Feb 22, 2012 at 6:00 PM

You are in the Subaru Impreza Maintenance & Repair Forum.

What is this discussion about? Subaru Impreza, Lights, Electrical, Sedan, Wagon

Messages Page 4 of 4

#28 of 30 no lights by rybread

Oct 17, 2011 (5:32 am)

only have hazard lights and door locks......why 1999 impreza rs

#29 of 30 red81 by red81

Feb 22, 2012 (2:47 pm)

My 2011 Subaru Impreza 2.5i sat idle for one day. When I went to drive it, the remote did not unlock the door. The security light on the dash was not lit. When I put the key in the ignition, the motor did not start, no noise, no lights on dash. When a meter was put on the battery, it registered 14.22. When the car battery was jumped by tow truck driver, car started reluctantly. Car towed to dealer. The next day the service department found the car had died again. Service department seems stumpted. Any ideas?

#30 of 30 Re: red81 [red81] by xwesx

Feb 22, 2012 (6:00 pm)

Replying to: red81 (Feb 22, 2012 2:47 pm)
14.22?! That's not good. A 12-volt battery, fully charged, should register 12.6 to 12.8 volts. If it was registering 14.22 while the vehicle was not running, then it is likely the unit is being severely over-charged. It should be at 14.22 (or close to that) while the car is running due to the incoming charge from the alternator. If the voltage regulator on the alternator is malfunctioning, it could go two or more volts higher than that while charging. This, in turn, can cause the water in the battery to boil off through overheating. It will still register voltage, but usable current could be very low due to reduced surface area within the battery.
 
Did the shop perform a load test on it? Did they check the charge voltage while the car was running?
 
Next question... did they try it with a different battery?

Messages Page 4 of 4

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