Here goes.
One stone and one bird at a time.
Remove all your trigger. Close all your doors. If the remote still shows the trunk is open. End of the show! You have issue with either the unit or remote. Get that corrected. Don’t waste your time on the diagnostic.
One stone different bird this time with the assumption that your unit and the pager unit is working.
You have one trigger in the car that gives you an indication that something is open. You indicated that the "GREEN/ black wire shows ground whenever the doors, hood or trunk is opened". Use that one only! Why? Do you really care what is open when your pager unit tells you a door is not completely close? That said, connect the GREEN/ black wire to the door trigger wire of the alarm unit. Beside the hoodpin wire, don't bother with the PURPLE / black wire on the alarm unit unless you want to know what is open or not completely close. Personally, I like to use one wire to trigger everything. One less wire connected, one less issue to find out why the trunk is still indicating open. Anyways, I think this will be enough to get you started with your investigation.
DIRECTWIRE™ WIRING INFORMATION - PONTIAC / FIERO / 1988 / Remote Start
12volts red + ignition harness
Starter yellow + ignition harness
Second Starter
Ignition pink + ignition harness
Second Ignition
Third Ignition
Accessory orange + ignition harness
Second Accessory
Keysense
Power Lock lt. blue + either kick panel
Power Unlock black + either kick panel
Lock Motor
Unlock Motor
Parking Lights+ brown headlight switch
Parking Lights-
Hazards
Turn Signal(L)
Turn Signal(R)
Reverse Light
Door Trigger white or dk. grn. - pinswitch, cluster
Notes: The white at either pinswitch will catch the doors and the dk. green at the instrument cluster will catch the doors, hood, and trunk.
Dome Supervision
Trunk/Hatch Pin dk. green - instrument cluster
Notes: The white at either pinswitch will catch the doors and the dk. green at the instrument cluster will catch the doors, hood, and trunk.
Hood Pin dk. green - instrument cluster
Notes: The white at either pinswitch will catch the doors and the dk. green at the instrument cluster will catch the doors, hood, and trunk.
Trunk/Hatch Release
Power Sliding Door
Factory Alarm Arm
Factory Alarm Disarm
Disarm No Unlock
Tachometer PURPLE / white AC ECM
Notes: The ECM is located on the back wall between the seats.
Wait to start
Brake Wire white + steering column
Parking Brake
Horn Trigger black - steering column
Memory Seat 1
Memory Seat 2
Memory Seat 3
Interface Module: Category:
Immobilizer Bypass Required:
No Type:
N/A
Part #: N/A
Notes:
Smart Starter Kill Relays: Not Available
This wiring information is being provided free of charge on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it using a digital multimeter.
Directed electronics, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. DEI assumes no liability or responsibility resulting from improper installation, even in reliance upon this information.
Be careful whose advice you buy, but be patient with those who supply it.