87 mustang door locks

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=512
Printed Date: May 14, 2024 at 12:05 PM

Topic: 87 mustang door locks

Posted By: sach_deva
Subject: 87 mustang door locks
Date Posted: April 28, 2002 at 9:57 PM

yeah hey guys I have a slight problem with my door locks. I followed my ungo ms 2000 install manual. According to them,

1st relay

87 and 86 constant 12 volts (+)
85 unlock wire from alarm
30 to actuator
87a from switch

2nd relay

87 and 86 constant 12 volts(+)
85 lock wire from alarm
30 to actuator
87a from switch

I followed this to the book, and each time I plugged in the fuse to the 12 volt power wire, the fuse blows. I don't know what to do?

Replies:

Posted By: Velocity Motors
Date Posted: April 28, 2002 at 10:09 PM

I see the problem, you have power going to one of the pins that is supposed to go to the alarm. Go to this diagram and it will fix your problem:

https://www.the12volt.com/doorlocks/page3.asp#arp

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

Posted By: sach_deva
Date Posted: April 28, 2002 at 11:56 PM

Thanks Jeff

-------------

Posted By: Velocity Motors
Date Posted: April 29, 2002 at 5:13 AM

Hey not a problem. Just post your results if it still does not work.

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

Posted By: sach_deva
Date Posted: April 29, 2002 at 4:42 PM

hey,

I was just looking at the diagram, and wouldn't cutting the wire running from the switch to actuator, and using only the wire to send a signal to actutator break the circuit running through the swtich and the actuator, rendering the switch on the doors useless?

-------------

Posted By: Velocity Motors
Date Posted: April 29, 2002 at 5:39 PM

No ,because the relay circuit is normally closed connecting the pin 30 to pin 87a. This way the switches still work and you won't have a problem.

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

Posted By: scss
Date Posted: April 30, 2002 at 1:13 AM

Another thing that could be causing problem is that you didnt cut the wires from master switch.

Posted By: sach_deva
Date Posted: April 30, 2002 at 2:10 AM

sorry if I don't get it but according to the diagram there is only a signal going to the actuator, the relays don't receive any signal from the door locks, so how do my door locks still work if they the wire carrying the signal is not wired to the relay? (87 mustang factory door locks, not aftermarket, I'm assuming they are reverse polarity)

-------------

Posted By: sach_deva
Date Posted: April 30, 2002 at 2:33 PM

but both the passenger and driver have control over both door locks (They both have swtiches.)

-------------

Posted By: Velocity Motors
Date Posted: April 30, 2002 at 2:52 PM

Wire 2 realys like this:

RELAY # 1:
86 - LOCK output wire from the alarm/remote starter
30 - Motor side of lock wire
85 & 87 - 12 volts constant
87a - Switch side of lock wire

RELAY # 2 :
86 - UNLOCK output wire from the alarm/remote starter
30 - Motor side of unlock wire
85 & 87 - 12 volts constant
87a - Switch side of unlock wire

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