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Hello, so i have a 01 c5
yesterday i drove to work and nothing was wrong, but when i left work. I put the key in turn it to on, all the guages works, ac, radio everything. As soon as i tried to turn it on it just clicked and everything turned off. I went to pop the hood and the next second i look up the hood is pouring smoke out. When to look and the battery positive is completely melted off. Checked starter fuse (60a in pass floor board) and it wasnt popped when to see if it was the problem and it still was sparking/melting.
the engine has 0 ohms from positive. But the body has from 9 ohms to .9. Im going to disconnect the starter tomorrow to see if that is the problem. But as of right now i have no clue where to start.
You can check the positive battery cable down to the starter…BTW checking using resistance from “engine to positive” means nothing….if either the battery positive or negative battery cable has only one copper stand remaining you will see 0 ohms…will 1 strand carry hundreds of amps during starting…no….learn voltage drop when doing any tests like this…there are many on YouTube…BTW the fuse is the circuit protection for the “S” terminal at the starter…nothing to do with your B+ terminal melting.
I second doing voltage drop testing between your battery and starter, however, I have seen that kind of damage to side post battery terminals before from loose or dirty terminals. The voltage drop, and therefore, heat, could easily come from a loose terminal. Make sure you check the battery terminal under the rubber boot for any corrosion as well. Either way, you need a new battery to proceed with the testing.
Looks like the battery terminal was EDM'd by a loose battery cable. Electro Discharge Machining is done by controlled spark discharging which, in effect, removes material by arcing away at it. At least that is what this looks like.....
I second doing voltage drop testing between your battery and starter, however, I have seen that kind of damage to side post battery terminals before from loose or dirty terminals. The voltage drop, and therefore, heat, could easily come from a loose terminal. Make sure you check the battery terminal under the rubber boot for any corrosion as well. Either way, you need a new battery to proceed with the testing.
Originally Posted by grinder11
Looks like the battery terminal was EDM'd by a loose battery cable. Electro Discharge Machining is done by controlled spark discharging which, in effect, removes material by arcing away at it. At least that is what this looks like.....
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Melted battery terminal
most likely a loose or dirty terminal.
