Question about 1991 Toyota 4Runner

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My radio on my 1991 Toyota 4Runner does not work seems like there might be a trick to it.

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Think, did the radio stop working after your battery was disconnected for a period of time? If so you may have a "Theft deterrent radio" This is where a small chip in the radio has a program that remembers how to operate your radio. If the battery is disconnected for longer than about 30 minutes, then that chip looses its memory and your radio does not work. This is of course to prevent someone from stealing your radio and using it. Normally when disconnecting a battery with this "Theft deterrent system", a small 9 volt battery is clipped across the positive and negative leads of the battery so that the radio does not loose it's memory. Thieves know how to do this, so it is not much of a deterrent system. The only catch is that you have to take it back to a dealer in order for the radio to be reprogrammed as they are the only ones allowed to have the programming tools. Count on paying 75-100 bucks.

Posted on Mar 22, 2011

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If you have disconected your battery and radio lost power,you have to reset it with secure code.you can fin the code in your manual.

Posted on Mar 22, 2011

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You should have told me that you did not have the proceedure when I gave you the unlock code, Malaree. I could have walked you thru it.
You need to tell me what is on the display when you turn the radio on.
Does it say "HLP", "HELP" or SEC". This is important to the proceedure.

Toyota Ed

Sep 26, 2008 | 1991 Toyota 4Runner

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