2003 Buick rendezvous radio 12V ignition/Acc pin not supplying voltage.

Asked by Oct 07, 2017 at 03:27 PM about the 2003 Buick Rendezvous

Question type: Maintenance & Repair

I got an after market radio (Dual XTM265) along with a wiring harness for a
Buick rendezvous 2003.  A few days ago, I tested with a multi meter, the pins
that plugged into the previous radio to figure out which one was the
ignition/acc.  I found one that was 12V when the key was turned and was not
when the key was off.  I'm assuming that's the ignition/acc pin, so I adjusted
the wiring harness to match.  I turned on the car, and it worked! however it
was dark and late at night so I didn't actually put the car back together.  This
morning, I put the car back together only to find that the radio didn't work.  
After taking the dash apart again, I found that the pin previously identified as
the ignition/acc pin was not supplying any voltage when the key was turned.  
The General power directly from the battery is working however, so this
leads me to believe a fuse is blown.  I looked at several fuses that I thought
might be the correct ones however I found noting.  I only know what I
learned about cars during this process so I have no clue where to look next.  
Does anyone have any ideas as to which fuse might be blown or where to
look to find the problem if there isn't a blown fuse (I really hope its just a
blown fuse)  I have no clue what would have changed in the past couple of
nights, the car was off the whole time and locked.  Thanks in advance for
any help.

2 Answers


You have probably blown a fuse. The radio gets 12 v from two sources and both are fused. One 12v source is on all the time so the clock does not shut off. The other 12 v source is with the ignition. The fuse box and the owners manual usually tell you which fuses. Maybe a google search will show something

I'm probably just blind but I cant find a place to edit my question or reply to an answer so I have to resort to posting an answer? Anyways, I have looked at a few of the fuses, problem is, I'm not sure exactly what one should correspond to the 12 ignition. This is the site I'm using and it is accurate: http://www.autogenius.info/buick-rendezvous-2003-fuse-box-diagram/

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