i did this mod on my '98.... so i had to do it on the '89 also 
this mod allows you to "hide" your garage door opener instead of having to hang it on a visor or something like that. the opener is operated from a switch that you can place (or hide) anywhere on the car.
a previous owner installed some type of car alarm, he had a LED mounted on the dash so i removed the LED and used that existing hole. it's a good location for the purpose of the button - maybe not so good if you don't want to drill holes in your dash. in my '98 i have switches hidden in my ashtray.
this mod is pretty simple as far as parts go. but you will have to get a soldering iron and know how to use it. depending on your garage door opener - you may have to figure out what pins you need to use.
i have a craftsman door opener. the openers i have done this mod on have been similar - but slight changes over the years.
- open up the garage door opener case. you will need to find which pins are used to operate the opener. solder a length of wire (i used 22 guage wire) to each pin.
http://smiley.tzo.com/fbody/backups/garagedoor.jpg
http://smiley.tzo.com/fbody/pics/button_garage_wire.jpg
- solder or use quick disconnects to attach the other ends of the wires to the contacts on your switch. any momentary SPST should work. on my '98 i used a stock switch that was made for operating the convertable top. for the '89 i used a pushbutton switch from radio shack.
http://smiley.tzo.com/fbody/pics/button_garage_89_switch.jpg
- complete wiring looks something like this. i added some quick disconnects (or you can use butt splices) towards the end by the opener. that way i can mount the switch in the dash, feed the wires down under the dash kickplate and hook them up to the opener.
http://smiley.tzo.com/fbody/pics/button_garage_89_wire.jpg
- for the '89 i just put the opener under the driver side kick plate under the steering column.
http://smiley.tzo.com/fbody/pics/button_garage_89_dash.jpg
- completed dash. you can see 2 buttons there.... the black one is the garage door opener, the red one is for the power antenna mod.
this mod allows you to "hide" your garage door opener instead of having to hang it on a visor or something like that. the opener is operated from a switch that you can place (or hide) anywhere on the car. a previous owner installed some type of car alarm, he had a LED mounted on the dash so i removed the LED and used that existing hole. it's a good location for the purpose of the button - maybe not so good if you don't want to drill holes in your dash. in my '98 i have switches hidden in my ashtray.
this mod is pretty simple as far as parts go. but you will have to get a soldering iron and know how to use it. depending on your garage door opener - you may have to figure out what pins you need to use.
i have a craftsman door opener. the openers i have done this mod on have been similar - but slight changes over the years.
- open up the garage door opener case. you will need to find which pins are used to operate the opener. solder a length of wire (i used 22 guage wire) to each pin.
http://smiley.tzo.com/fbody/backups/garagedoor.jpg
http://smiley.tzo.com/fbody/pics/button_garage_wire.jpg
- solder or use quick disconnects to attach the other ends of the wires to the contacts on your switch. any momentary SPST should work. on my '98 i used a stock switch that was made for operating the convertable top. for the '89 i used a pushbutton switch from radio shack.
http://smiley.tzo.com/fbody/pics/button_garage_89_switch.jpg
- complete wiring looks something like this. i added some quick disconnects (or you can use butt splices) towards the end by the opener. that way i can mount the switch in the dash, feed the wires down under the dash kickplate and hook them up to the opener.
http://smiley.tzo.com/fbody/pics/button_garage_89_wire.jpg
- for the '89 i just put the opener under the driver side kick plate under the steering column.
http://smiley.tzo.com/fbody/pics/button_garage_89_dash.jpg
- completed dash. you can see 2 buttons there.... the black one is the garage door opener, the red one is for the power antenna mod.
