Print Page | Close Window

87 Mustang Trunk Opening

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=505
Printed Date: August 23, 2025 at 12:03 PM


Topic: 87 Mustang Trunk Opening

Posted By: sach_deva
Subject: 87 Mustang Trunk Opening
Date Posted: April 28, 2002 at 1:46 PM

Hey guys!

   I have a slight problem, on my 87 mustang the wire for popping the trunk is Positive but the wire from my alarm(Ungo ms2000) for the trunk is 500ma negative how Do I attach this to positive trunk wire




Replies:

Posted By: Velocity Motors
Date Posted: April 28, 2002 at 3:34 PM

You need to place a relay to reverse the polarity of the signal from the Ungo alarm. Wire a 30/40 amp automotive relay like this:

  • 86 and 87 : constant 12 volts ( + )
  • 85 : Grounding Input from Ungo alarm
  • 30 : ( + ) output to trunk release wire

If you need anything else, just post your questions. Good luck.



-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA



Posted By: hot_shot_guy123
Date Posted: April 29, 2002 at 4:31 PM

Hey sach_deva, I have just finished installing a Ungo alarm into my car and it works great.  I hooked up all the features.  If you ever need any help with ungo alarms I can help you.

hot_shot_guy123




Posted By: Thinkster
Date Posted: April 30, 2002 at 4:02 AM

I'm suprised people still don't understand the concept/function of a Relay or how to hook them up (Even the diagram is stamped on the relay).  I suppose using a power transistor instead of a relay would be even harder to understand.  





Print Page | Close Window