Can you do 1200 miles with no Alternator

If you have an ecm, yes, thats further than i would be comfortable with.

under a certain threshold, the ecm will shut down the engine.

 

No gauge on dash? Don’t run at night, headlights will drain it fast. Try to pick one up along the way. At least you’ll have it. If it’s a manual park on a hill, before shutting it off. If it has air leaks, keep an eye on the air gauge. Once below 60 lbs. Brakes won’t release. Can you make it? Let us know. An extra new battery onboard would insure you don’t get stranded.

 

I did run like that with just the APU running
For charging, but night time just didn’t work

 

I was just about to suggest this. If they have LED headlights it might be alright even at night. If the alt is simply putting out limited voltage it might be just enough to cruise along without discharging or charging the batteries. Checked with a multimeter?

 

It must be working at least a little bit. I’ve had that happen twice and neither truck went more then about 150 miles.

 

Silly question, but why didn't you stop within all of those miles somewhere and get another alternator whether you put it on or had someone else put it on?

This Thread kind of reminds me of that Seinfeld episode where Kramer took the car out for the test drive and he had to see how far it would go until it ran out of fuel...