Man garage door openers are expensive! Go to your local pull-a-part and rip out a homelink system from a sun visor. Open it up solder wires to the first switch(one on each side of the switch). Buy a cheap momentary switch from RS or your local electronics shop. Solder the two wires to it(switch is just to complete the circuit). Wire in power and ground. I "waterproofed" mine with rtv but make sure you set it first! I installed this on my '90 mounted the switch above the starter button. Cost about $8.