Garage door opener remote

I am looking to hard wire my garage door opener remote into my Xterra. I tried having the remote always on and then applying power but that won't work with my remote. I have a Chamberlain Security+ remote. So, I'd like to make turning my high beams on the switch using the remotes battery.

How do I get the activation of high beams to complete the garage door opener circuit?

Use a relay.  Contact 85 goes to ground, 86 goes to high beams.  When the high beams are turned on, the normally open contacts (30 and 87) close, and complete your circuit.

-------------
My ex once told me I have a perfect face for radio.

Thanks for the help.

Hopefully my last question - The remote has a 3V battery in it. Will my vehicle's 12v coming from the high beam into the relay cause a problem in the remote?

No- the 12v from the high beam circuit simply energizes a coil that magnetically pulls the contacts closed.  They are isolated from each other.  I'd also add a diode across the coil as well.  This will prevent voltage spikes from jumping around.  Put it backwards from how you normally would- stripe side on the side with the high beams.

-------------
My ex once told me I have a perfect face for radio.

I'm not familiar with diodes. Could you tell me what kind I would need and how to hook it up?

Thanks.

1 amp diodes will be fine.  They are one-way valves for electrical current.  You can get a 25-pack at Radio Shack for a few bucks.  Just hook it up like noted above- stripe side to the high beam side of the coil, other side to the ground side of the coil.

-------------
My ex once told me I have a perfect face for radio.