Clifford Alarm Stopped Unlocking Door?

The 10.2x is the 2 way version of what you have with a different remote, so its brain will be the same as yours.

You could take it to an Electronics/TV repair shop and they should be able to fix it, Might be a bad solder connection is all that wrong with it.

Also the 12.5x is the same brain also. all the clifford alarms that I have listed all have the same wiring plugs and all use the 548t antenna like yours. The 12x and the 12.2x might also work but antenna type is not listed so not guaranteed.

But all of them are discontinued, right? So, Ill have to find a brain donor.... I can take a look inside and see if the solder connections are bad, but I kinda did that already and they look fine. Do relays just 'up and die' like this? The lock works fine. Unlock is the issue.

Which leads me to believe its a bad connection. most likely the pin where it connects to the board as it get flexed over time. Otherwise its the relay, if you have any electronics experience you can test with a dmm on contitnuity setting from 1. pin to board, 2. while operating the unlock from remote across the suspect relay, and 3. relay pins to ground while operating the unlock from remote. Relays do fail with time but are repairable. if you can't find a replacement brain it can be replaced with a newer model if you swap 1 wire at a time and stay with DEI brands the colors will be the same.

What do I swap it with? I like the 2 way system.

You can still find them on ebay under the different brand names. this is a 1 way that uses the same plugs minimal wiring just use your antenna and program your remotes. Here on ebay Viper 5000 for starters. http://www./itm/Viper-5000-Remote-Car-Alarm-System-with-remotes-P-N-3301V-/172277421085?hash=item281c88d41d:g:yysAAOSwepJXZbUF The internal DEI number 3301v/x/p is the one way system And the 3302v/x/p is the 2 way system. The only difference between a 1 way and a 2 way is the antenna and remotes. And you can swap a 1 way antenna for a 2 way to upgrade to 2 way. For you purposes the 1 way is cheaper.

If I were to get that one, All I need out of it is the brain, right? Just plug everything else in wire for wire? If I use my current two way antenna, then from transcross, I can use my 489x remote. Is that correct?

Yes The only thing that might be different would be the door locks if yours has the 7 pin wire plug as this has the 2 wire door lock.      Basically the 7 pin has the 451m built in, but for you vehicle all you need is the 2 pin (-) to operate your locks direct to alarm).    If yours is only 2 wire then your good to go. Program remotes (you might have to delete all remotes first with new antenna then swap for your original antenna) then program the remotes you want up to 4.  And any settings non-default from original to the new one.

I dont quite follow. http://pdf.ampire.de/viper/Viper5000_installation.pdf This seems to indicate that it has a 7 wire lock harness...no?