hi guys.i have a bravo hgt.the car keeps cuting out for no reason and the key cde light stays on the dash and wont start.i brought it to my local fiat garage they ran the computer on it and it sais the altennator was gone.would this cause the car to cut out.and key code light to stay on.i gave the go ahead to replace it but is my bravo finaly fixed.

the alternator can fail in one of 2 ways. it either has reduced output, which runs the battery flat, or it produces too much output (faulty voltage regulator) which cooks the battery. either can cause the engine to stall, and either problem could cause the key code light to come on. the immob is sensitive to voltage changes. if the starter motor couldnt turn the engine due to insufficient battery charge, it would also suggest the alternator could be the problem. a quick test with a multimeter can tell you what the alternator is doing. i hope the garage have actually tested the alternator before recommending its replacement. i would have preferred to fit a scrapyard alternator (£10-20). its easily replaced.

Yup as Jug says i would have tested it myslef and then a scrap alt. All you need is a cheap multimeter to test it.