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87 mustang door locks

Home / the12volt's Install Bay / Relays / 87 mustang door locks (Topic Closed Topic Closed)
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sach_deva 
Copper - Posts: 63
Copper spacespace
Joined: March 20, 2002
Location: Canada
Posted: April 28, 2002 at 9:57 PM / IP Logged  

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?

Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: April 28, 2002 at 10:09 PM / IP Logged  

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
sach_deva 
Copper - Posts: 63
Copper spacespace
Joined: March 20, 2002
Location: Canada
Posted: April 28, 2002 at 11:56 PM / IP Logged  

Thanks Jeff

Velocity Motors 
Moderator - Posts: 12,488
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: April 29, 2002 at 5:13 AM / IP Logged  

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
sach_deva 
Copper - Posts: 63
Copper spacespace
Joined: March 20, 2002
Location: Canada
Posted: April 29, 2002 at 4:42 PM / IP Logged  

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?

Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: April 29, 2002 at 5:39 PM / IP Logged  

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
scss 
Member - Posts: 25
Member spacespace
Joined: April 29, 2002
Location: United States
Posted: April 30, 2002 at 1:13 AM / IP Logged  
Another thing that could be causing problem is that you didnt cut the wires from master switch.
sach_deva 
Copper - Posts: 63
Copper spacespace
Joined: March 20, 2002
Location: Canada
Posted: April 30, 2002 at 2:10 AM / IP Logged  
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)
sach_deva 
Copper - Posts: 63
Copper spacespace
Joined: March 20, 2002
Location: Canada
Posted: April 30, 2002 at 2:33 PM / IP Logged  
but both the passenger and driver have control over both door locks (They both have swtiches.)
Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: April 30, 2002 at 2:52 PM / IP Logged  

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

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