2006 kia optima lx etacs bad? - Kia Forum
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post #1 of 3 (permalink) Old 05-20-2011, 06:27 AM Thread Starter
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Default 2006 kia optima lx etacs bad?

My girlfriend had me install a new radio, but some how i was given a wiring harness for a new model withing the 2006 year range. I hooked up the radio and it smoked. I pulled the radio off and put the old one back in and it worked until i got the correct wiring harness. I put in the new radio with the correct wiring harness. The new radio worked but then stopped after about a minute. the old radio doesnt work anymore. When i connect either radio now the trunk open light comes on and stays on. when the key is on Acc or if the car is running when i hit the power locks to lock it locks then unlocks right off the bat. could this incorrect wiring harness cause problems with the etacs and maybe burned something out in it? I checked the power coming into the wiring harness for the radio and it still has power to the correct wires.

If anyone has some advice it would be awesome so i can get this issue fix so my GF can have a radio again and not have the power locks issue and to get that trunk light from staying on. Thank you very much
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post #2 of 3 (permalink) Old 05-20-2011, 01:34 PM
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Was the original radio the average run of the mill Optima radio? Some cars have a "higher end" radio like an "Infinity" branded radio. These usually have a secondary "box"/power unit that changes the radio wiring as the speakers connect to the second box. If it's a conventional radio then the only other power connections are MEMORY/BACKUP and the POWER FEED. The rest of the wires feed the speakers.
If it had a higher end radio then all bets are off on conventional wiring...You'll need to find the correct wiring on "kiatechinfo.com"

Have you cut/spliced into the dash wiring? If not and are only using a pre-wired "adapter plug to stripped wires" I'd be looking at your first wiring attempt..

After market radios (Sony/Pioneer/etc) come with fused memory and power wires and the fuse would have blown BEFORE the radio would have SMOKED. Did you cut out the fuses in the power leads in the harness supplied with the new radio?... I believe your first wiring attempt was wrong and you somehow fed 12v into a speaker ....damaging the speaker and the radio. Then replacing the radio and new adapter harness tried to drive the now damaged speaker with the new radio...thus damaging the new replacement radio's amplifier section and blowing the "radio fuse" under the dash in the car's fuse box. When you reinstalled the "old" Optima radio... the fuse in the fuse box was still blown and the original radio won't come on because of it.

(1) Check all of your wiring AGAIN
(2) Check the fuse that protects the radio (and all the others in the fuse box)
(3) Check the original speakers in the car as if 12v was across on of them the voice coil will be damaged and the radio (old or new)will be looking at a dead short on that speaker wire.. The first time you turn it up you WILL damage the radio! A 4 ohm speaker will read approximately 2 ohm DC resistance SO look for one reading 1 ohm (or less) with an ohm (multimeter). Compare all four speaker wires...one will read differently from the other three.
(4) Your strange results "may" be coming from the blown fuse box fuse (or) your wiring attempts... If all else fails REMOVE all your added wiring (replace fuse) and try the door locks, trunk light, etc...
(5) Do NOT remove supplied in line fuses or fuse holders and do NOT replace fuse(s) with higher amperage (A) fuses...even for just a "second". Damage happens in milliseconds. (before the larger fuse can react).

I ran a high end audio/video service company for 20+yrs and am basing my diagnostics and suggestions on what I found in damaged equipment over the years...
If a manufactor could eliminate a fuse and fuse holder they would...to cut costs!
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post #3 of 3 (permalink) Old 05-20-2011, 01:36 PM
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Oh BTW...No good deed goes un-punished... One of "Murphy's Laws" :-)
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