[brcidd]

First- my schematics show the trunk light switch on a separate circuit from the tamper switch-- the light switch has a blk/wht and an org/blk wire to it-- whereas the trunk tamper switch has a blk and a lt blu wire to it

Rear Compartment Lid Latch Switch In the center of the rear compartment, on the rear compartment latch


Rear Compartment Lid Tamper Switch
On the center rear of the rear compartment lid, on the rear compartment lid lock cylinder


I had a Riviera act the same way once-Horn would go off at intermittent times- even while driving- (lights also flashed- because it was the alarm going off)-- Anyway, it was the tamper switch inside the driver's door- so I snipped that wire for good-- problem solved