I don't know what kind of auto parts stores they have in Mexico, but just about anywhere in the US you can just take your truck to any parts store and have the batteries load tested. You can also pop the alternator off and have it tested as well. That's what I usually do when I'm in the same situation you're in. If that's not an option hopefully someone will be able to help you figure it out for yourself.
My bats are good, sears die hard 2-3/4 years old out of 5. The only guy I know of that can test for codes is drunk 7 days a week. alt life?? I hear is oround 130,160,000 mi. Seems to fit. Just so happens my girl is in the states an getting on a plain to come home tomarrow so HELLO NAPA AUTA PARTS!
A forum community dedicated to Ford F-series owners and enthusiasts with a Power Stroke diesel engine. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more!