after new batteries & altnatial my car only start sometime help on 1999 Cadillac Eldorado

my car only start sometime after the new thing i have put into it it still start some tome the radio and light come on but it will not start

by in Las Vegas, NV on January 14, 2011
2 answers
ANSWER by on February 02, 2011
YOU COULD POSS HAVE A BAD STARTER ASSM! CADILAC LIKES TO PUT STARTER UNDER INTAKE SO IT GETS HEAT SOAKED AND THE DESERT ISN'T VERY NICE TO ELECTRICAL PARTS HERE IN TOWN
ANSWER by on March 27, 2012
if the anti-theft light is on..... you can try a relearn process first... turn key to "on", leave for 30 min. exactly turn key to off for 10 min exactly. repeat 2 more times. then remove key from ignition. let sit about 30 sec to a min. then try to start. if that doesn't work try to clean the metal ends, both sides, visable on key with a small nail file, using the not so rough side. lightly run across metal portion about 3 times. this cleans the contacts allowing the elec signal to be sent fully to start car. it worked for me, tried on first set of keys, worked. tried spare key w/o doing the filing and it didn't work. filed and it started. been working everyday, all day for last 3 months. hope it works for you, will keep about $150-$200 in your pocket.