We went to the store yesterday and when we came out our expedition wouldn't turn over. There were no lights inside or out. We cleaned the battery connections, still nothing. We jump started the car and drove home fine but when we shut it off it again wouldn't start and no lights. We then noticed that the battery saver relay was clicking. I haven't been over to have the battery checked out to see if it is good yet, but it is only a year and a half old. Are there any other suggestions, has anyone dealt with this kind of problem? thanks in advance.

 

New batteries do fail, possible the battery has shorted internally. Just measure the battery voltage, should be 12.5 to 13.5 VDC.

 

Your alternator could be bad also.

 

Ditto on the bad or dead battery due to charging issues.