PCM vs FCM low beams out/battery draining 04.5

[Kilroy]

Started out with low beam on passenger side out, new bulb made no difference. After a couple of weeks, now other low beam is out.



Also have issue with battery 's (new 3 months ago) discharging down to 11. 9 volts over a period of only 4 days.



Researching this problem, sometimes I see reference to FCM being the problem, sometimes PCM. These things are expensive and I'd rather not buy more than I have to. Is there away we can test these our self's, or is this a dealer thing?

 

[sag2]

The PCM has nothing to do with the headlamps. There is not really a good way to test the FCM without a DRBIII. You are probably going to have to visit the dealer.