Radio & Clock not working in 2002

Okay, so I made a mistake in replacing the battery in a 2002 Elantra- I started to put the cables on the opposite terminals and you can guess the result... a sparking surprise. I immediately switched the battery around, but now the radio and clock in the car do not work. I checked all of the fuses in the cabin and those in the engine compartment, but they all checked out fine. Any thoughts on what happened and how I can fix this issue.
 
Thanks so much!

Does the radio have a theftlock feature?
 
I.e. is the radio displaying a message saying code or theft?

No, the clock and radio are completely blank. I don't think there is a theft prevention feature on the 02 Elantra.

Hmm.... you may have fried the radio then.
 
Are you sure you checked all the fuses?
Underhood and in the car?

from some of my reading it seems highly likely that the radio has an "in-line" fuse protecting the unit. Does anyone know where this is located? Would it be in the engine compartment or behind the radio?
 
Thanks to anyone that may know the answer.

If the radio, and the clock, and oh, say the door courtesy lamps, the trunk lamp, the dome lamp are all out, check Fuse 25 in the Passenger Compartment Fuse Box, the one at the right end of the bottom row:
 

 
I know you said you checked the fuses, but that's the one that controls all the stuff I listed.  If it's not that, and those lights and stuff work, you may have a problem with your ETACS, the unit that controls your alarm and a lot of other functions in the car.

Thank you for your response.
 
Now that you mention it, I do notice that the overhead light and door lights do not work as well. Fuse 25 was burned out originally when I checked the fuses, so I replaced it- unfortunately this didn't cure any of the issues.
 
Are the ETACS and the TACS separate systems? I saw on the HMA service website that they list them separately. Are these units something I should attempt to replace or am I at a point where it would be best to let the professionals at the dealership figure out what is going on?
 
I appreciate any help that you can provide.

I think the radio itself has a fuse on it.
Pull out the radio and look behind. Then start checking your wireing for voltage and your power/ground connections.

It's got to me a short then.  Do you have an aftermarket radio?  Try disconnecting that.  That circuit also provides some power to the ETACS.  (I think ETACS = TACS.)

quote:

ORIGINAL: pamador

Okay, so I made a mistake in replacing the battery in a 2002 Elantra- I started to put the cables on the opposite terminals and you can guess the result... a sparking surprise. I immediately switched the battery around, but now the radio and clock in the car do not work. I checked all of the fuses in the cabin and those in the engine compartment, but they all checked out fine. Any thoughts on what happened and how I can fix this issue.

Thanks so much!

I tried replacing my CD player and the same thing is happening in my 02 sonata. The cd player, clock are blank and the automatic key won't lock or unlock the car. I've checked all the fuses. any ideas?

Did you check the fuses in the passenger compartment?  (There are two fuse boxes; one under the hood and one under the dash.)

quote:

ORIGINAL: Doohickie

Did you check the fuses in the passenger compartment?  (There are two fuse boxes; one under the hood and one under the dash.)

yes, thanks, it was a 10A clock fuse. now i know to remove my neg cable on the battery before i start working on the cd player

Glad it worked out!

Thank you, thanks you, thank you!!
 
Had the same problem - accidently crossed wires jumping the vehicel (was planning to replace battery before winter anyway and just waited one day too long!) and the n had no clock, no radio, no dome lights, no remote (unless the car was running!!! What's up with that?!), no warning chimes, and a really "wonky" temp and gas gauge.  Checked all the fuses that seemed even remotely related but just never thought to check the "Room/LP" fuse #25!  Not even sure what the heck that refers to but .... all is well in Elantra land once again.
 
Thanks!

This is easily the most common electrical issue with Elantras when the stereo is messed with.  Fuse 25 powers a lot of things, including radio memory, the clock, dome lights, and the ETACS which controls the alarm system.  There is a second source of power to the ETACS that comes on when the key is on, that's why it works when the engine is running.
 
ROOM/LP means "Room Lamp" (dome light).  I guess they label it that because they feel someone will notice if their dome light goes out and they will then know what fuse to check.
 
I added an extra light in my trunk and I think the wire rubbed up against the body once, shorting the power and blowing the fuse... I was in a curve and had a bag of cement back there.  It went thump against the side and then my radio died.  I replaced Fuse 25 (with a spare from the fuse box) and was on my way with everything working again.  It freaked me out pretty good at the time.  So while a lot of the advice I give on this board is from reading the manuals and stuff, this one I actually have personal experience with.

im currently experiencing the same problem.. as i was trying to install my aftermarket stereo back into the car, it stopped working along with the clock and the interior dashboard/speeometer lights.. and i checked all the fuses they seem to be fine, any suggestions?

Can anyone out there give me any insight on a problem...The fuse F25 inside the car blows.. Right now I have no: Radio/Interior lights/Gas gauge/Eng. temp/Door locks...I did notice when the car is on the door locks will jump to the opposit position if attemted to lock or unlock??