What can cause the battery connector fuse blow out

Tiny
ANTEAUS
  • MEMBER
  • 2006 NISSAN ALTIMA
  • AUTOMATIC
  • 122,000 MILES
I heard a pop then the car shut off no response from any lights or radio.
Wednesday, December 4th, 2019 AT 6:40 PM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

A fuse blows because of a short to ground, before the load, in the circuit[s] that it is protecting. This happens because of Ohm's law, which are the laws that govern electricity. One of Ohm's laws states that if one of the three properties of electricity is constant[Voltage-Battery Voltage is always constant in an automotive electrical circuit] and one of the remaining two properties go down [Resistance=Resistance goes to zero when the electrical path takes a short circuit back to the negative battery terminal before the load] then the last property [Amperage/Current-Amps go to battery amperage] must go up proportionally. The amperage becomes more than the amperage rating of the fuse and "pop" the fuse blows, creating an open in the circuit, protecting it, just like it was designed to do. What was the exact fuse in your vehicle that blew? We can send you wiring diagrams and a guide on how to find the short the ground when we get the exact fuse that blew.

Thanks,
Alex
2CarPros
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Thursday, December 5th, 2019 AT 12:54 AM

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