I have a new baterry and a new alternator .....

the cable /fuse to alternator has nothing to do with the start and run function if the battery is charged up and in good condition ,sounds like the main battery cables have a bad contact/connection or battery is shot<follow battery cables and remove all points of connection in engine bay area clean contacts with sandpaper and resecure all connections 1 AT A TIME! to make sure none are swapped around by mistake ) on both earth cable/negative and the positive/power cables,make sure terminals on battery are clean and tight , try boosting/jump starting your battery with jumper cables connected from another cars battery positive to positive .........negative to negative and see if it starts ,i doubt the problem of starting up is the alternator unless battery is flat and not being charged by alternator ,by jump starting with another baterry will give you the answer once all baterry cables and connections are clean and secure

A mechanic would disconnect the battery and check each circuit for a voltage drain by disconnecting the fuses and breakers. Anything with a relay or way to use electricity such as a light bulb or switch can cause a small short to ground or voltage drain.

If battery and alternator are good is starter solenoid pulling in? it may be that whilst you have a new battery it may require charging new doesn't mean fully charged, batt may have been on shelf for awhile

check the charge at the alternator output first with the ground on the alternator, then ground at the battery my guess is there is a faulty ground from the alt to either engine block or body

It's probably your alternator. When your alternator isn't working properly your battery provides all or most of the car's electrical power. Until you can replace the alternator you can disconnect one of your battery cables while the car is not in use and that will prevent the battery running down. One way to check if your alternator is the problem is to disconnect the negative battery cable while the car is running. If the car goes dead, it is very likely an alternator problem. It usually requires about an hour of labor to replace an alternator. Most alternators can be rebuilt at an alternator repair shop and that is cheaper than buying a new or re-manufactured one.

to truly eliminate the alternator you have to disconnect from the wires over night to see if battery is still drained good chance that alternator is the cause.you also can put a test light in between the battery and the ground cable (negative)as you disconnect the alternator you should see a difference in the test light. the bulb will dim down if alternator is draining the power.

ok start the car and unhook the positive cable from the battery if it dies the alternator is still defective i have gotten brand new ones that didnt work if this doesnt work you might have a short

The light indicates that the battery is receiving insufficient charge voltage from the alternator. Take the car to an autoparts store and have the alternator output checked. Most parts stores will do the test for free. Sorry for your trouble and I hope this helped. Best wishes.

My 2002 Ford Escape had a similar issue later in 2006. My alternator died and I needed replacement. After replacing, the light would come on and off at times. When everything running (i.e. radio, air conditioner, driving lights) and tocuh electric windows up the power would lower and sometimes battery light on dashboard would come up. Original mechanic could find out what was going on and I lived for 2-3 years with it.

This past August 2009 after a long trip (i.e. 8 hours or so) my battery died. Brought to a auto parts place and they determined it was the baterry and the alternator. Since I was back on my home town I went to a good friend that is a mechanic and he fixed it for real.

He had a similar issue with three different Escapes coming back with alternator or baterry or both death. He found out that Ford has an official report for Escapes that when this happens the electric fan behind the radiator are short circuiting, affect direclty the baterry and alternator killing them, and needs replacement.

Try this and may work for you.

This gona sound ignorant and obvious but you have a short in the abs sys or ECM -----get a code reader from Advance auto to see if you can pinpoint the issue----you give them a deposit then when you return code reader they refund your deposit---oh have you changed anything in the vehicle such as radio----added speakers---had an accident--new ign sys etc etc---GL