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Question:

What would happen if you installed a car battery in backwards?

I installed my brand new battery in backwards, it was late at night and i couldn't see what i connected. When the terminals connected, a green wire connected to the starter popped in smoke. I took my truck to a mechanic and they said i fried my computer and that i needed a new one.or a used one. IS this seriously what i didbecause this is a $500.00 F*** Up.

Answer:

I also changed my battery in the dark. Bad idea, was in a hurry to get it done. Bought a battery off a mechanic for my 2001 Honda Civic and assumed it was the right one. It wasn't the polarity were reversed. I couldn't see the + and - because it was too dark. I watched the positive cable spark for about 10 seconds then pulled it off realizing what I had done. Fortunately the main 80amp fuse in the engine compartment fried and that's where the damage ended. Bought a new fuse and the right battery and changed it in the daytime. I guess it depends on what kind of vehicle you have because I didn't fry anything.
that is somewhat not basic to assert precisely. Did it burn each and every of the rubber insulation off of the cord? or perhaps even burn the cord in 2? If no longer you're likely ok. I mean it would not damage replacing that floor cord basically so in a lengthy time period down the line you haven't got issues. Does the automobile nonetheless run? i have had batteries short out and do a similar element. Fried the black cord grounding the battery to the automobile. Burnt off each and every of the rubber insulation. My basically option on the time changed into black electric powered tape I had contained in the glove container. I placed a battery in it and drove it abode. i in my opinion forgot about that tape restore I had done till analyzing your question. i must have pushed that truck yet another 40,000 miles with out issues.
You can certainly take your truck to a second mechanic for another opinion, but yes, that is what can happen if you hook the battery up backwards. It tends to fry electronics. Don't be surprised if once the new compute is hooked up, there is more damage to other components. And, yes, 500 bucks is actually fairly cheap for a new main computer for the car. Do it yourself, when you aren't careful, can be a lot more expensive than paying a professional to do it in the first place.
First, locate the main circuit fuse under the hood in a fuse box ( hope you have an owners manual)it will be a large fuse of 80 - 100 amps.most you can view thru the top and see if it is blown.if blown, may require removal of fuse box as fuse is bolted from underneath. DISCONNECT THE BATTERY BEFORE YOU DO TRY TO CHANGE FUSE!!!!!
surprise! the computer is not fused on the ground side. when you power it from the ground side, the power does not just run in reverse, it burns out components. youll be lucky if you didnt fry every piece of electronics on the car. usually the first thing to take place in an electronic component is power regulation. when you hit it from the backside, your hitting all those resistors and diodes and chips backward with a full 12v load.

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