My fusion 2011 sel with 3.0 engine
and only 47,000. kms on it would not start after sitting for a couple of days. Battery was charged and the same thing happened after it had been charged and was driven for about 50 kms.it was charged one again and then driven to Canadian Tire, a large automotive garage wher I had bought this battery one year earlier. I asked the to chek the battey for phantom drain and they reported they could not detect any on their meter.. I had them r3place the battery and lo and behold, the next morning it was dead again. After recharging the battery, My son in law ran the engine for a few minutes and then dieconnected the battery, then used his multimeter on the bare bat terminals wewatched as thw battery started draining itself...with nothing on. It certainly would have drained itself.
JA: Did you test the battery with a voltmeter? And have you ever changed one before?
Customer: .Yes, he did. We're beginning to suspect it may be the relay on the alternator
and it is failing to open when the engine is shut off.. I intend taking it to the Ford dealer where I bought it (used) . If they can.t come up with a betterreason for the problem, I'll replace the alternator.
JA: Are you fixing your Fusion yourself? What have you tried so far?
Customer: no, only doing some trouble shooting. I have already answered this question.
JA: Anything else you want the mechanic to know before I connect you?
Customer: I wonder why the first mechanic could not detect this phantom foltage loss when he specifically was looking for any drainage? Have you ever known the alternator relay to be at fault?