Need Help W/ Locks 88 Mustang

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=32573
Printed Date: July 09, 2025 at 7:30 PM

Topic: Need Help W/ Locks 88 Mustang

Posted By: Junior73
Subject: Need Help W/ Locks 88 Mustang
Date Posted: May 22, 2004 at 6:06 PM

I just finished installing an Astra 777 in my Mustang, and I wired the locks through relays. 12v in to 87 &86, (-) input from the alarm to 85, and cut the wires at the drivers kickpanel and ran them to 30 & 87a. When the alarm energizes the relay, it blew the fuse that was on the 12v. I started with a 15, and went al the way up to a 30, and nothing. Is it neccessary to actually catch the wires at the drivers switch, and not in the kick panel? The locks still work fine through the switch, just not with the alarm.

Any help will be greatly appriciated.

Keith

Replies:

Posted By: draasch
Date Posted: May 22, 2004 at 10:51 PM

Door Lock Pink / YELLOW
Door Unlock Pink/Light Green

Driver's Kick Panel or behind left Front Speaker
Reverse Polarity

here is what you need to do with two relays:

relay one (lock relay)
87 12v
86 12v
85 ground
87a switch side of cut lock wire
30 motor side of cut lock wire

relay two (unlock relay)
87 12v
85 12v
86 ground
87a switch side of cut unlock wire
30 motor side of cut unlock wire

i would put a in line fuse on the 12v wires....10 amp min.

-------------
Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt

Posted By: Junior73
Date Posted: May 23, 2004 at 10:52 AM

Thanks for the info. I did fuse the 12v line. I started with a 15 amp and went all the way up to a 30, and it blew as soon as the relay was energized from the alarm. I double checked the wires, and I them wired teh way that you have described. Is it possible that the lock circuit takes more than 30 amps?

Keith

Posted By: profuse007
Date Posted: May 23, 2004 at 7:38 PM

Junior73 wrote:

Is it possible that the lock circuit takes more than 30 amps?

no, check ur connections again

-------------
Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).

Posted By: Velocity Motors
Date Posted: May 24, 2004 at 12:10 PM

I've noticed with doing Ford's with the 5 wire systems that you have to go to the driver's side door or after where they come into the car. If you try to 5 wire them at the passenger side kick panel, you will blow fuses all day long.

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

Posted By: Junior73
Date Posted: May 26, 2004 at 6:43 PM

Thanks for all the info guys. It turns out that when I tracked the wires out of the door, I inadvertantly switched them. I.E., I had the switch going to pin 30, and the motor side hooked up to pin 87a. Boy, don't I feel stupid. All is great know, and again, thanks for all the help.

Keith