Asked by Sep 21, 2016 at 02:37 AM about the 2014 Volkswagen Jetta SE

Question type: Maintenance & Repair

2014 vw jetta se I hooked up the battery
backwards now car just runs off battery power alt
is shot in sure all the warning lights come on
Windows won't roll up or down blinkers don't work
radio don't work did I fry the computer please
someone help me out thanks

14 Answers


Check all fuses & circuit breakers under hood and also under dash and check the terminal wires and ground wire from battery to frame and ground wire from engine block to frame for burned wires, it has safety measures built in so I am sure you will be able to fix it,

3 people found this helpful.

Now I just saw that you must have had the key on because the windows blinkers ect does not work. Yes this will or can fry the alternator and if key was on yes fry the fuses under dash and I am sure the main fuse is blown too under the hood but also if key was on it may have fried the computer or damaged it, ifits not cranking then if all bad fuses replaced and still no crank up then yes it fried the computer.

1 people found this helpful.

If it does however run then you need a alternator and locate the blown fuses could be under hood and under dash.

1 people found this helpful.

Be sure to check those grounds I mentions above as they took the heat so to speak and may be burned or melted.

1 people found this helpful.

I always thought that battery terminals should be different sizes too instead of just different color. As in the dark color does not matter.

1 people found this helpful.

There is also a ground wire and fuse at the computer to check, the fuse for computer may be on it or in wire leading to it. Let me know how this goes. If I can think of anything else I will be glad to help.

1 people found this helpful.

Good advise from enginecreator, but remember this vehicle uses a BCM to control all of the accessories, when the power is disrupted in an incorrect manor the BCM looses is factory preset programming so none of the vehicles accessories will work, unfortunately the only place to get the BCM reflashed is the dealer.

1 people found this helpful.

Also was wondering if driving the car would fry the fuse box fuse box was fine the one under hood my girlfriend let her friend drive car to work and now the whole right side of the fuse box is fryed


I am sure it was headed that way already.

1 people found this helpful.

Ahhh man this sucks

But another thing is I never had the key on on even in ignition

Sorry ment never had the key in ignition


Is the fuse block melted or blown fuses on half of it?

1 people found this helpful.

Blown fuses

Your Answer:


Looking for a Used Jetta in your area?

CarGurus has 27,268 nationwide Jetta listings starting at $1,500.


Volkswagen Jetta Experts

  • #1
  • #2
  • #3
    Tom Demyan
View All

Related Models For Sale

Used Volkswagen Passat
408 Great Deals out of 22,767 listings starting at $1,299
Used Honda Civic
486 Great Deals out of 44,345 listings starting at $1,150
Used Volkswagen GTI
71 Great Deals out of 5,325 listings starting at $2,500
Used Honda Accord
682 Great Deals out of 101,646 listings starting at $999
Used Volkswagen Golf
60 Great Deals out of 4,743 listings starting at $1,500
Used Toyota Camry
858 Great Deals out of 70,625 listings starting at $1,300
Used Toyota Corolla
672 Great Deals out of 63,571 listings starting at $1,499
Used BMW 3 Series
998 Great Deals out of 30,043 listings starting at $900
Used Audi A4
180 Great Deals out of 9,657 listings starting at $1,400
Used Nissan Altima
861 Great Deals out of 61,735 listings starting at $1,000
Used Volkswagen CC
48 Great Deals out of 1,974 listings starting at $3,495
Used Chevrolet Cruze
481 Great Deals out of 62,117 listings starting at $3,250
Used Mazda MAZDA3
225 Great Deals out of 23,549 listings starting at $1,740
Used Hyundai Elantra
467 Great Deals out of 45,902 listings starting at $1,700
Used Volkswagen Tiguan
222 Great Deals out of 20,210 listings starting at $4,000

Used Cars For Sale

2015 Volkswagen Jetta SE For Sale
34 Great Deals out of 907 listings starting at $6,800

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.