New car battery installed but vehicle still has zero power
A brand-new battery will fail to restore power if the main ground strap between the engine block and the frame is severely corroded, or if rodents have chewed through a vital wiring harness. These hidden connection breaks leave the fuse box completely unpowered, preventing the vehicle from turning on at all.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Check the main ground strap from the block to the frame for corrosion
- 2Inspect wiring harnesses for rodent damage
- 3Check battery connections for looseness
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“I put a brand new battery in it installing it correctly and it’s still getting no power. I tested the fuse box of the fuse box is not getting any power.”source ↗
“That six month sit is the real killer here, check the main ground strap from the block to the frame, they corrode like crazy on these interceptors”source ↗
“Rodents ate away at a vital harness.”source ↗
Where this came up
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