the 120A alt fuse went byebye during my battery upgrade. i keep telling myself i couldnt have switched the neg and pos but maybe they touched in the wrong way while i wasnt looking? shit. if the 120A alt fuse is blown, is it reasonably accurate to say my assumption is correct? thank you.
I did the same thing once. The person that owned the car before me put some stupid unmarked fosgate terminals on my car. I hooked up the booster pack and blew that fuse. Got a new one and everything was fine. If you hooked a charger or anything up bakwards and that fuse blew....its a good thing. It'd probably be alot worse if it didnt blow
p.s. if your pinched for time to get the car back up and running you can bridge the fuse back together as long as you dont plan on blowing again, because if the fuse is manually bridged and something goes wrong you'll start damaging other components.
No, when that fuse blows... a couple others go along with it.. A couple green 30 amps i believe.
If the 30 amps are blown, the car will not start.
If every other fuse is good and just the 120 is blown, the car will run for a few minutes and then blow the two 30's again and the car will shut down.
Thats how it was in my experience anyways, because when iw as trying to fix the problem, i didnt even realize the 120 amp was blown. I kept replacing other fuses that kept repeatidly blowing, and while those fuses were replaced the car would run for a short period of time.
The second i put the new 120 amp in, the 30's stopped blowing and the car was fine.
Replace the 120 and check all the other fuses in the box under the hood. You should be fine.
When i blew my 120 out, my two in line fuses for my head unit blew, and my horn also.
I dont think any of your components got damaged though, but only time will tell.
If your anxious to test the car you can replace the other fuses that blew and rebridge the 120amp together. The only downside is...if you hookup the battery wrong again..the 120 cant blow and it will start damaging components.
well, while your waiting for the fues to come in just pull your other fuses out and visually check them. you guys probably didn't damage anything by blowing a fuse, remember what the fuse is there for, so IT blows instead of what it is sending the power to.
today i did a complete test of the fuse in the engine bay box and dead-petal box. not only did i do a visual inspection, i also tested the plug end with a volt meter to test connection.
as mentioned the only fuse that were blown is the 120A alt, 7.5A trac, and 20A rad fuse. The two small ones i replaced and im waiting for the 120A from toyota. i found no blown fuse in the dead-petal fuse. what WAS curious is door 30a and defog 30a in the dead-petal box fuse thread looks alil dark. but my voltmeter confirms a good connection.
i dont get how the ignitor or the ecu coulda blown when so few fuses blew. im so frustrated.
i apologize w/ my questions but i have another... i read someone who reversed polarity the battery and blew the 120A alt fuse... and he said he got nothing when he tried to crank the car. is this true?