My Subaru Outback is currently stranded, unable to start or turn over. I was able to correct this issue roughly a month ago after removing then reconnecting the battery terminals. The battery has been tested and passed with no problems. I also noticed that the car has power when the key is in the on position but loses power if I apply the brakes or turn the ignition to the "start" position. I also saw a bit of corrosion on the negative battery terminal so my next step will be to grab a multimeter and go check voltage to the terminals. I'm sure both incidents occurred just after a heavy rain storm but that could be a coincidence. What else should I check when I get my hands on a multimeter?

it does seem like you could have a bad battery connection or bad battery cable.

do you hear a 'click' when it fails to crank? Could be a bad starter solenoid or starter motor....

 

That is a definite possibility. The last time I ran into this issue I had clicking when I tried to start the vehicle. This time I don't get any clicking unless I disconnect the battery for a few minutes. After going through this process I get one click on the first start attempt and then nothing. Any idea what that would indicate?

just some wild ideas.....

 

if it 'clicked' without any noticeable reduction in power to lights or anything, I'd suspect the contacts in the solenoid.

 

but, with the power drain, it could be anything from a shorted brake wire to a seized engine I guess....?

 

you should be able to test all the brake lights and marker lights. If they are all good, maybe there's shorted wire in the boot from the body to the rear hatch - try starting or test brake lights with the hatch up...?

 

you may need to charge the battery independently to do any testing.

 

You might consider a new thread, asking for a shop recommendation near Asheville. Someone may direct you to a subaru-friendly independent mechanic.

 

 

Edited July 16, 20196 yr by 1 Lucky Texan

Bad ground. Grab each end of the negative battery cable and give it a good bend and twist. The copper wires in the OEM cable are very fine and can corrode through. If that fixes it replace the cable anyhow.

Edited July 16, 20196 yr by uniberp1

If all tests ok with the battery/cabling, as Lucky T  mentioned, possibly an issue with the starter.

When you say the "start" position, you don't just mean on, but rather the cranking/starting position?

While someone turns the key to the start position, use a long piece of wood to tap on the starter. It may be hung up on a "dead" spot. If this works, replace the starter (rebuilt Subaru only is the recommendation on the board)

Edited July 17, 20196 yr by brus brother

Could it also be if its an automatic that the ECU does think it is NOT in P or N. Quick try is to put key in On and cycle through the gears ending in N position.

Not sure brake needs to be pressed for starting in N of P with handbrake on. 

Check if the brake lights go off when brake is applied and tried to start (second person or mirror), if so there is a short or battery is broken.

For all other electrical, most help above is logical.

90%+ of the time this is a battery or battery connection issue.  do not go replacing starters or alternators or unecessary things until the battery system has been properly gone through. 

A. what was the battery voltage?  12.XX....what is it if it was tested?
B. any recent work done to the vehicle?
C. how old is the battery?

first steps - this looks long but it only takes a few minutes.  go grab one of these for $3: 

https://www.harborfreight.com/battery-terminal-cleaner-94450.html?cid=paid_google|*PLA+-+All+Products+-+Lower+Sales+Items|New+Products+-+(1)+Price+<%2410|94450&utm_source=google&utm_medium=cpc&mkwid=sZrVWypDk|pcrid|318476002950|pkw||pmt||pdv|c|slid||product|94450|&pgrid=63088204786&ptaid=pla-298214602708&pcid=1654049980&intent=&gclid=EAIaIQobChMIxZfb_ZS84wIVBZ-fCh1QowLOEAQYAyABEgLpEPD_BwE

1. clean the battery posts - the parts sticking up off the battery - make them shiny
2. clean the battery cable terminals - the clamps that clamp the post.  The insides need to be shiny metal
3. make sure the battery terminals are tight on the posts, you shouldn't be able to twist them by hand. 
4. test the battery again or measure voltage and post what your sitting voltage is.  "test" is fairly generic and 
5. once the connections are all clean get a good set of jumper cables or jump pack - does the car start or turn over then?