MY freind hooked his Battery terminals backwards. now his fc has no power.. any ideas on how to fix it of what could have got hurt in the doing ...... please let me know asap


Thanx


Dustin

 

Bukmpppp Help

 

umm.. maybe check the BATTERY?

 

Check the fuses to see if any blew.

 

Blew the main fuse I bet. I had a local guy call me with the same problem last night.

 

indeed, main fuse under the hood is generally the first to blow. Occasionally a few under the dash will go (interior lights/motor fuse/etc)

 

First thing to check is the main engine fuse in the engine bay fuse block. I think 100A

 

It will be an 80a fuse. To take the fuse out you will need to remove the 2 nuts holding the fuse box in place. Pull the box off of the screws. Then open the 2 side panels to get to the screws holding the fuse in place (3 screws in all). Slide it out and replace.
Had to replace the damn thing twice this weekend.

 

Thanx for all your help ill check YThat thanxxx

 

friend did the same thing to his toyota and it fried almost everything

 

I've seen ecu's killed this way, for some reason the main fuse did not protect it.

 

Maybe I'm missing something, but why would a fuze blow from reverse polarity? I little segment of metal doesn't know the difference between regular and reversed polarity...only a diode does.

-Joe

 

my friend did that to a chevy s-10 we were working on last night nothing happened though , kinda disappointed, I was hoping the whole car would catch fire

 

Did the same to mine. Like sonicrat said, the main fuse went, along with a few random interior fuses. Should be an easy fix.

 

the first thing you must do is admit this happend to your fc

 

ya why would you check it if it was tour friends car again?? why not just call him? admit it you broke it.

 

DPO(dreaded previous owner) did this to my car, this was the reason she was DOA when I bought her. $80 later it was running like a champ

 

No Really it happend to my freinds....(i waz planing on buying it thought LOL) he found the prob to be a 75 amp fuse in the interior....

Thanx for all your help

 

My best guess would be that the main fuse blows because the diode bridge circuit in the alt voltage regulator allows the reverse current to flow the complete path without resistance, similar to a direct short, and the fuse in this circuit happens to be that 80A main... You could simulate the same short if you were to remove that cable from the top of the alt and touch ground with it. Current is reversed, of course, but the normal circuit path is there (the fuse takes a long time to blow, compared to the velocity of electricity's time scale, which is why some ECU's take a crap during an "oops" episode)...