homelink wiring question

Ok I installed and hooked it up, only used the orange and black wires with black being negative, so orange is 12 volts. I left the white wire unhooked.
It works great!
It came from a 99 I think and my 97 shop manual doesn't show it in the wiring diagrams.
I'm still curious about what the white wire is for if anyone has a newer manual.
My overhead has lights so only the orange and black were there anyway.

Bob B
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Hi,
I picked up a three button homelink that mounts into the overhead console, and it has three wires to it. It's from a 99? tahoe.
What are the connections?
Orange, black, yellow.
Thanks,
Bob B

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