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What fuse ? Radio fuse 20 amp - located in the underhood fuse box ? Before replacing fuse did you check for B+ voltage with a DVOM - digital volt ohm meter ? Internal problem in the radio ? Do you have onstart ? have an amp ? Satellite radio ? Changed fuse , was the old one blown ?
Radio Power
The radio does not use a discrete ignition feed circuit for power moding. The power mode master (PMM) provides the system power mode to the radio via serial data messages. The PMM determines the system power mode by processing power mode information from ignition switch inputs. Serial data power modes supported by the radio are OFF, ACCESSORY, RUN, and CRANK REQUEST.
Your best bet , take it to a qualified repair shop , you have no idea how complex these systems can be . Hooking up a GM factory scanner to check data inputs from the BCM (PMM) power mode master should be done to diagnose this .
Most likely a fuse. If your fuse box is labeled it will say radio under the fuse. If its not check your owners manual for location of fuse box and radio fuse.
Sounds like you blew a fuse. The fuse for the radio and ACC which I believe would be the lighters as well is located in the interior fuse panel (see picture of location below) and will be the fuse in the number 4 position (see 2nd picture below of diagram of layout). Now I hope you have the security code for the radio that should have come with the vehicle because you will need to enter it in order to get the radio to work again as it will be locked until you do. On Honda/Acura if you begin to enter the code and you start to enter it wrong continue with a code anyhow because you can't go back. You have 3 trys. If you mess up 3 trys in a row, the radio will be locked for 1 hour and then you can try it again. I hope this helps and good luck.
Can be a blown fuse, Check your owner manual for the appropriate fuse that refer to what it is for such at lights, radio etc... and the location of where the fuse in located. Once you find that out, pull the fuse out to see if the fuse is blown, if it is blown replace it with the correct fuse amp. Sometimes there are couple of fuse that are reference to the same details too.
this sounds like the radio fuse, also check the lighter and assy, fuse. if you do not know where fuse box is and location of fuse. go to any auto parts store and they will tell you where it is.
check fuse block for shorts, melting discoloring,on back side of fuse panel around starter relay. loose connection causes fuse block to over heat will need to be replaced.hope this helps.
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