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Guest Message by DevFuse

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dash lights flashing gauges bouncing car hesitating surging - Alternator?

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6 replies to this topic

#1 milty60


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Posted 31 January 2018 - 08:08 AM

My sons dash gauges are bouncing up and down, dash idiot lights flashing off and on car occasional surges or hesitates. I've experienced this multiple times on my cars and my parents. Its always been a bad alternator. I'm assuming same for this Subaru. Tried to drive it home last night no lights on or heater fan, only emergency lights. Made it half way home - battery fully drained. Brought battery home - charged it - just picked up alternator. Heading out to do the install. Hopefully past experience is dead on. 


Belt is tight, battery year old,  all cables clean and tight. Hope a separate regulator is not hiding somewhere - don't know if its internal to alt. 


Thoughts? Advice? 





#2 montana tom

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Posted 31 January 2018 - 08:39 AM

Regulator is built in.

#3 Fairtax4me



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Posted 31 January 2018 - 09:55 AM

Alternator most likely.

#4 1 Lucky Texan

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Posted 31 January 2018 - 10:15 AM

steering felt OK?


mostly likely alt. You could get the original rebuilt locally if you can do without the car for a few days.

#5 Mike104


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Posted 01 February 2018 - 02:01 PM

Auto parts store alternators are not that good.  A used Subaru one is often better.

#6 Rooster2


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Posted 01 February 2018 - 04:03 PM

If not alternator, then it is the battery. I had a car years ago with same problems as yours, dash lights and gauges were going crazy nuts. Turned out to be a bad cell in the battery. Car would still start, but run like crap, because of low voltage to the car computer. Replaced the battery, an that cleared up the problem.

#7 milty60


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Posted 05 February 2018 - 10:18 AM

Thanks for all the info - I replaced the alt -  all is good



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