Hi Talis31. Welcome to the forum. Was the alternator checked while the problem was occurring? It is real common for them to be intermittent due to worn brushes. Use a cheap digital voltmeter to measure battery voltage while the engine is running and when the problem is acting up. Ideal is 13.75 to 14.75 volts.
If the voltage is low, the next step is to measure the voltages on the two small nuts on the back of the alternator. One must have full battery voltage, and the other one must be less but not 0 volts. Those two voltages will tell us where to go next.
Saturday, August 21st, 2010 AT 2:58 PM