WKderF
03-05-2006, 04:26 AM
Ok I am going to explain how relays work and tell you how to wire a few simple relays up.
Your standard relay that every uses or get with a fog light kit or at the auto shop looks like this. It has four sometimes five tabs. The fifth tab is generally in the center. Four tab models do not have the center tab. They are label like this
-- 87
85 I -- I 86
87A
I 30
The I and -- represent the tabs in this picture
Top is 87
left 86 center 87A right 85
bottom 30
http://scoobymods.com/forums/attachment.php?attachmentid=2250&d=1077866841
I relay needs power ( +12V ) and ground( -12V ) on tabs 85 and 86. Doesn't matter which gets which generally. Lets say 86 gets +12 V and 85 gets -12 V. OK?
When the relay has connections and power on these to tabs it is "energized". It switches conections between the tabs. All it is is a electrical switch. So when 86 has +12 V and 85 has - 12V (ground) it is energized and it switches connections between the tabs. When it is "energized" or "switched on" the tabs 30 and 87 are connected to each other internally.
http://scoobymods.com/forums/attachment.php?attachmentid=2251&d=1077867750
When it is not "energized " or "switched off" the tabs 30 and 87A are connected. If you only have a 4 tab relay this does not apply.
So if +12V or -12V (ground) ins not present. This is how the tabs wiull be connected.
http://scoobymods.com/forums/attachment.php?attachmentid=2252&d=1077868009
Lets do a simple relay. this works for horns or fog lights.
http://scoobymods.com/forums/attachment.php?attachmentid=2253&d=1077868411
Let do starter kill , like most alarms.
This could work for the ignition wire too.. wink wink
Now this is a tricky one. See when the alarm is off the relay is not energized. So the connection is between 30 and 87A. So the starter wire is connected. But when the arlarm is on... it has - 12V at 85 and when the starter is turned it get +12V at 30 and moreimportantly 86, which energizes the relay and makes the relay change the connections from 30 and 87A to 30 and 87. Which dissconnects the starter.
http://scoobymods.com/forums/attachment.php?attachmentid=2255&d=1077869294
Ok now we switch between horns. This will require a switch.
The switch will be connect to the relay and to ground. The horn wire under the hood are +12V. If you wnat you can use another relay to up the power then connect the output of that relay to the 30 tab of this relay. When the switch is oof the stock horn blows. When it is on the hellas blow.
http://scoobymods.com/forums/attachment.php?attachmentid=2256&d=1077869824
The reason I jumper the horns +12V or the starter wires +12 V is for ease of use and one major thing. If you used a +12V constant. the rlay coulkd be on for long periods of time. Causeing it to heat up and if parked for a week it could drain a battery dead. So I always think how long and how much will this relay be energized.
One last security one. this will not work for everyone bit it cna be tailored if you think about it. It will work for DEI alarms on Subys.
the colors are standard DEI colors. You may need to diode your starte kill wire at the starter kill and at the relay so that they dont feed back and forth to each other. The silver band on the diode should face away from the relays when you wire it in.
What this will do is give you a pulsing horn honk with your flashing parking lights when you door is opened. I sort of 2nd alert. A cheap way to get that responder type alarm. So you can physically hear if they've gotten inside your ride or if its a frigging cat.
When the siren is going off, the door is opened and the parking lights are flashing while the alarm is armed, the horn will honk.
http://scoobymods.com/forums/attachment.php?attachmentid=2258&d=1077871099
Your standard relay that every uses or get with a fog light kit or at the auto shop looks like this. It has four sometimes five tabs. The fifth tab is generally in the center. Four tab models do not have the center tab. They are label like this
-- 87
85 I -- I 86
87A
I 30
The I and -- represent the tabs in this picture
Top is 87
left 86 center 87A right 85
bottom 30
http://scoobymods.com/forums/attachment.php?attachmentid=2250&d=1077866841
I relay needs power ( +12V ) and ground( -12V ) on tabs 85 and 86. Doesn't matter which gets which generally. Lets say 86 gets +12 V and 85 gets -12 V. OK?
When the relay has connections and power on these to tabs it is "energized". It switches conections between the tabs. All it is is a electrical switch. So when 86 has +12 V and 85 has - 12V (ground) it is energized and it switches connections between the tabs. When it is "energized" or "switched on" the tabs 30 and 87 are connected to each other internally.
http://scoobymods.com/forums/attachment.php?attachmentid=2251&d=1077867750
When it is not "energized " or "switched off" the tabs 30 and 87A are connected. If you only have a 4 tab relay this does not apply.
So if +12V or -12V (ground) ins not present. This is how the tabs wiull be connected.
http://scoobymods.com/forums/attachment.php?attachmentid=2252&d=1077868009
Lets do a simple relay. this works for horns or fog lights.
http://scoobymods.com/forums/attachment.php?attachmentid=2253&d=1077868411
Let do starter kill , like most alarms.
This could work for the ignition wire too.. wink wink
Now this is a tricky one. See when the alarm is off the relay is not energized. So the connection is between 30 and 87A. So the starter wire is connected. But when the arlarm is on... it has - 12V at 85 and when the starter is turned it get +12V at 30 and moreimportantly 86, which energizes the relay and makes the relay change the connections from 30 and 87A to 30 and 87. Which dissconnects the starter.
http://scoobymods.com/forums/attachment.php?attachmentid=2255&d=1077869294
Ok now we switch between horns. This will require a switch.
The switch will be connect to the relay and to ground. The horn wire under the hood are +12V. If you wnat you can use another relay to up the power then connect the output of that relay to the 30 tab of this relay. When the switch is oof the stock horn blows. When it is on the hellas blow.
http://scoobymods.com/forums/attachment.php?attachmentid=2256&d=1077869824
The reason I jumper the horns +12V or the starter wires +12 V is for ease of use and one major thing. If you used a +12V constant. the rlay coulkd be on for long periods of time. Causeing it to heat up and if parked for a week it could drain a battery dead. So I always think how long and how much will this relay be energized.
One last security one. this will not work for everyone bit it cna be tailored if you think about it. It will work for DEI alarms on Subys.
the colors are standard DEI colors. You may need to diode your starte kill wire at the starter kill and at the relay so that they dont feed back and forth to each other. The silver band on the diode should face away from the relays when you wire it in.
What this will do is give you a pulsing horn honk with your flashing parking lights when you door is opened. I sort of 2nd alert. A cheap way to get that responder type alarm. So you can physically hear if they've gotten inside your ride or if its a frigging cat.
When the siren is going off, the door is opened and the parking lights are flashing while the alarm is armed, the horn will honk.
http://scoobymods.com/forums/attachment.php?attachmentid=2258&d=1077871099