Anyone else get tired of deciding you want to get in your trunk, having to walk back to the front of the car, open the driver's door, and pull the manual trunk release, and then walk back to the trunk when you don't have your keyless entry remote in your pocket to pop the trunk? Happens to me often enough.
I planned this out a few weeks ago, ordered a nice, flush momentary switch, and got around to wiring up the relays and everything yesterday. Sorry for the crappy cell phone pics.
I wired this switch up so that it will only unlock the trunk if the vehicle is unlocked (doesn't matter whether you lock/unlock it with the keyless remote or the button on the front doors). Once you lock the car, power is no longer going to the switch in order to pop the electronic trunk latch mechanism. This was done via 2 relays and a diode, wired to the wiring at the factory keyless entry module (thanks to forum member
j-ritt99 for the schematic for the keyless entry!). The switch is a black, aluminum switch that I got on EBay. Nice and flush. You can't even see it when at eye-level with where it's mounted... you have to be at license-plate level (below the switch) to see it.
My original rear reflector panel was drilled for a backup camera system by the previous owner. All holes were left open, and this switch happened to fit right in there. I plugged the other 3 smaller holes with silicone for now, but have an un-molested reflector panel that I received recently (thanks
contour_r_us!) where I will be drilling only one hole from the switch, centering it a little better between both license plate lamp lenses.
Works like a charm though, and no security concerns since, again, the trunk cannot be opened externally via this switch if the car is locked. Next electrical project will likely be an express open and close relay setup for the moonroof, change all incandescent bulbs for LEDs, and that's probably all for now until I order a Viper alarm/remote start for it. I already tied the power sunroof and power windows to the Accessory circuit, and wired the Accessory circuit so it stays on after shutting the car off until the driver's door opens. Getting this 16-year-old car up-to-date.
-Andrew