battery is connected backward

[SwitChiliIce]

When a car battery is connected backward which fuse is designed to protect the vehicle Volvo C70 second generation? Where it might be located? I have checked all the small fuses inside and under bonnet but nothing found, the car is totally unresponsive.

[Clan]

Originally Posted by SwitChiliIce

When a car battery is connected backward which fuse is designed to protect the vehicle Volvo C70 second generation? Where it might be located? I have checked all the small fuses inside and under bonnet but nothing found, the car is totally unresponsive.

The positive battery lead is fused near the battery terminal , you will need a new positive battery lead if it is blown , but be prepared for other random electrical problems ..

[SwissXC90]

There are main power fuses right next to the battery
These are called PF1 and PF2, both are 150A

PF1 feeds the starter motor and alternator
PF2 feeds everything else in the engine compartment distribution box: F1...F31
PF1 and PF2 are in the actual battery cable where it attaches to the battery

They may be sacrificial fused cables, you may need new cables.
Check them with a multimeter, measure Volts, and find where the 12V from the battery stops.


NOTE you will likely also have damaged other devices.
Blowing a 150A fuse is a MAJOR overload.
What was damaged will only be apparent when the main fuse is replaced.
Be prepared for some other devices to have failed.

[SwitChiliIce]

Originally Posted by Clan

The positive battery lead is fused near the battery terminal , you will need a new positive battery lead if it is blown , but be prepared for other random electrical problems ..

I checked both of these fuses that are on the positive cable itself and funny thing is that these also seem to be not blown. Visually no burns or cracks on the fuses