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rpmdiag, Tech and Instructor
Category: Cadillac
Satisfied Customers: 8147
Experience:  Since 1975
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2004 srx intermttent anti-theft, had ecm replaced 7 months

Customer Question

Hi 2004 srx intermttent anti-theft, had ecm replaced 7 months ago,pbut problem persist disconnet/reconnecting battery gets car started,accidentally touch hot batery lead to chassis during disconnect/reconnect of battery now dic/radio is dead,checked antiteft , audio,ign3,ipc fuses they are good.
JA: Did you test the battery with a voltmeter? And have you ever changed one before?
Customer: Yes I have changed a battery before,this is a new battery ,so I did not check it with a voltmeter
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes
JA: Anything else you think the mechanic should know?
Customer: This is the second ecm so I dont think it is a ecm issue.
Submitted: 1 year ago.
Category: Cadillac
Expert:  rpmdiag replied 1 year ago.

Hi, welcome to Just Answer. I’m Ron and I’ll be helping you
Before we get started though, Please understand that I don't know
your skill level or tools you have to assist us. Also understand that
I can't see, smell, hear, or touch the vehicle either, so patience is
appreciated. JA is a great Q/A site, but it does NOT replace a
repair shop.
My goal is to make you happy and get a great rating in return for
my time. Sometimes I have to give you bad news that I know you
didn’t want to hear, so please don’t shoot the messenger.

I attached a procedure to reset the security system. I don't think it's a bad computer either.

Thanks, Ron

Customer: replied 1 year ago.
My skill level is good,I have performed the relearn procedure before also I have the auto repair/wiring diagrams for this vehicle I've just decided to give this forum a try. I will open the attacment and follow the procedure hich you have sent.
Expert:  rpmdiag replied 1 year ago.

Thanks, ***** ***** remember to rate me 5 stars and keep this link in case you need me again later on.


Customer: replied 1 year ago.
The car is driving very well.except for this issue. and it has to driven with the next 20 minutes,I was just taking a quick look at possible suggestions for this problem,but I know for sure that dic/radio no power issue came when I accidentally bumped the the positve side of battery lead to the chassis,this why I was hoping that there was a fuse or possibly a relay that had been shorted there a fuse on back of the dic/radio.
Expert:  rpmdiag replied 1 year ago.

Well, that short may have taken out the computer then.


Customer: replied 1 year ago.
The car is running fine just not getting dic/radio,car runs as smooth as butter,momentary arc short occured yesterday,right now just trying to isolatte mainly the dic no display issue the radio is secondary although I believe also relatated,I know that it (radio) is teied into the anti-theft as well.
Expert:  rpmdiag replied 1 year ago.

I'll opt out for you.

Customer: replied 1 year ago.
Customer: replied 1 year ago.
Im trying to give you a rating but the rating box is grayed out.
Expert:  rpmdiag replied 1 year ago.

Ok, try it now.

Thanks again, Ron