HELP

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

15,055

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 out of 3 people think this is helpful.
15,055

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 out of 1 people think this is helpful.
15,055

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

1 out of 1 people think this is helpful.
15,055

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

1 out of 1 people think this is helpful.
15,055

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 out of 1 people think this is helpful.
15,055

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 out of 1 people think this is helpful.
90,705

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 out of 1 people think this is 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

15,055

I am sure it was headed that way already.

1 out of 1 people think this is 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

15,055

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

1 out of 1 people think this is helpful.

Blown fuses

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