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check the ground leg to your engine.. it runs off the neg. battery terminal. will connect to frame and engine.. pull it off, wire brush it put it back.. you radio will work, 'cause it draws much less current, and is grounded in dash.
Had this before and i found a fault on the fuse board ,no supply the printed circuit maybe as i didnt go any further i just looped it from another fuse that had power via ignition switch through the radio fuse and it all worked but the fuse for the radio wasnt the one i looped as that had power for the memory it was another one that done the interior light and a thin bit of telephone wire done the trick so check all the fuses for power ,pull them out and check with a little 12v screwdriver light thing from the chinese shop ,right star trek is about to start goodnight
Answer 2 described my problem exactly, & solved it
in my 2006 Hyundai Elantra.
I had put the black "fuse puller" looking jumper in backwards.
Reversing it brot my radio, clock, dome lights & remote back to working.
Hi, behind your climate control panel is something called the Electronic Timing and Control Module (ETACM). This is like a computer for the chassis. All of the troubles you mention are tied into the ETACM. If you could find a used module at a salvage yard, it may solve your problems at a reasonable cost. To troubleshoot the problem will be very difficult and must be left to the dealer, which could be expensive. Just the same, I have included a few of the wiring diagrams in case you have a good multimeter and would like to try troubleshooting.