e55 baller

Anyone get this before? I get it all the time and I have a new huge 60lb battery. The AC keeps shutting off for periods of 2 to 30 minutes and I can't take it in the 90 degree heat, argg.

Yacht Master

Sounds like it is time for you to replace the AUX battery under the hood, pretty important as it is the backup battery for your brakes (SBC) too.

The Godfather

Interesting. I get convinience features turned off when I blast my music at full blast for 30 minutes (while driving on the freeway). But I have an amp and two subs, so that's probably just draining all the juice.

Ted Baldwin

your alternator is going bad. you will not get any other warning. No, you cannot use an obd 2 reader or star to find out. The car will continue to shutt of electrical consumers until finally the car will simply die. You may become stranded.

Ted

e55 baller

damn glad you knew this, I would have likely become stranded with no idea why, what do new alternators run on these cars?

The Godfather

That's been going on for a year, ever since I got the subs put in. All is well otherwise. We'll see what happens...

BenzoBoi

+1...I had that warning a while back and it ended up being the alternator.

The Godfather

Would it do it randomly for no reason? It only does it on rare occasions when I bump my **** at max volume for 30 minutes +.

BenzoBoi

Well I don't have a bangin system or anything like that so I haven o idea. Mine prolly took a dump because of mileage. I figured it was about time...

Esh

Your amp (or amps if you have multiple) are drawing a lot of current. Do your headlights flicker at night with volume at max?

CWW

Do you know your total amperage draw for your amps? And have you installed any caps?

Honestly, tho, I doubt that's your problem. MB alternators are oversized to begin with, you would have to go all xzibit on it before you would need more power. If all you did was add a set of subs and an amp, then odds are your alternator is crapping out.

ChicagoX

Listen to Ted.

You're looking at about $1200, installed.

The Godfather

No headlight flicker. I think that happens only on non HIDs anyway...

No caps. I'm saying it's not crapping out b/c it only happens when I do it at MAX volume with bass up like crazy. Only happened..maybe 3 times. But everyday I blast my music on the freeway, and it's fine. I guess if it fails, it fails. No reason right now to pre-emptively replace the alternator.

Jakpro1

Holy Cow! Ted Baldwin, what the heck you been up to you ya ole dog??

Just haven't seen that name in awhile.

Sorry if you've posting more lately, I've been off and on.

The man that took the G wagon bout as far as I've ever seen hp wise!

CWW

Try buying a cap and wiring it in between the battery and the amp for your subs, that might solve your problem. I like Rockford, and an RFC1 should do the trick nicely. It won't cost but about $60 or $70, and then you'll know for sure whether it's your alternator or not.

The Godfather

Yeah that's what I'll try.

Esh

Dash lights then? From what it sounds like, your amp/whatever else you're running is consuming all available power and when it gets to a certain point, your car starts shutting down other power consumers.

I know the E55's have pretty beefy alternators, but I'm running two amps (1000RMS x 1 and a 250RMS x4) and with volume cranked my dash lights do flicker at night. I would get a cap, but I mostly listen between 1/3 and 2/3 volume and there are 0 issues there.