osmonxp Posted October 20, 2017 Share Posted October 20, 2017 Car is a 2012 Subaru Legacy 2.5i Premium w/CVT. The car shakes when you use any kind of electrical item. I used the door locks and it shakes, same with windows. Anyone know what this could be? I'm thinking alternator or the battery. However, the battery is brand new. Could this be a grounding issue? Link to comment Share on other sites More sharing options...
GTEASER Posted October 20, 2017 Share Posted October 20, 2017 I would put a multitester on the battery with the car idling and see what you get for voltage. Then have someone roll a window down and watch what the voltage does. Report back to us. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Stapp's Law: “The universal aptitude for ineptitude makes any human accomplishment an incredible miracle.” "Simple incompetence is a far more sinister force in the world than evil intent." Link to comment Share on other sites More sharing options...
FLlegacy Posted October 20, 2017 Share Posted October 20, 2017 I would take it to the nearest auto parts store and have the whole charging system tested. Sent from my SAMSUNG-SM-G920A using Tapatalk Link to comment Share on other sites More sharing options...
LGTwagon1993 Posted October 24, 2017 Share Posted October 24, 2017 Definitely could be a grounding issue. Possibly inspect the ground points in the engine bay. Link to comment Share on other sites More sharing options...
Legacy199 Posted October 25, 2017 Share Posted October 25, 2017 My 07 and 14 Legacy did and does this. I'm not sure how severe the shake is, but my engine bogs when the doors are locked or unlocked and when the window is completely up or down. example; If the window is already all the way up and I press up, the engine bogs a bit when the button is held down. Link to comment Share on other sites More sharing options...
capttris Posted October 25, 2017 Share Posted October 25, 2017 My 2013 2.5 does this. It's VERY, VERY slight. Honestly, I think it is simply the alternator taking the electrical load, which is putting a load on the belt (and therefore the engine). I think the engine is so well balanced that any decent electrical load (especially a motor load, like windows) will cause this. It's not a defect. It's normal. It's simply the engine responding to the sudden increase of load from the alternator. Most cars to do this - most people maybe haven't noticed. Link to comment Share on other sites More sharing options...
BDII Posted October 25, 2017 Share Posted October 25, 2017 Power windows draw significant power. It's hard for your sewing machine motor to keep up. Need forum help? Private Message legGTLT Link to comment Share on other sites More sharing options...
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