I just typed this in an other thread, I've copied and I'll paste here:
The only way to find it, is to insert an amp meter in series with one of the battery cables, note the current reading and start removing fuses. One at a time (replacing each one after it is removed) until the circuit drawing the current is identified.
If you have a truck with the auto HVAC, check the blower fuses first.
The only way to find it, is to insert an amp meter in series with one of the battery cables, note the current reading and start removing fuses. One at a time (replacing each one after it is removed) until the circuit drawing the current is identified.
If you have a truck with the auto HVAC, check the blower fuses first.
