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Door Solenoid Relay Wiring

Jem

By Jem,
in Car Audio & Electrical

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Jem Explorer

Jem

Posted
Posted

hey guys,

the setup i'm thinking of cosists of two standard horn style relays (as in pins 85 & 86 on coil side, pins 87a 87 and 30 on the high current side), wired together to operate a door solinoid both ways.. tired and just for the life of me cannot remember how to do it, any help appreciated :rolleyes:

cheers,

marcus

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RANDY Veteran

RANDY

Posted
Posted

Soo... 87a is the circuit for naturally closed, and 87 is naturally open.

You've got a single pole, double throw relay right? SPDT

So when the coil is activated, 87 will join the circuit. When the coil is off, 87a will join a different circuit. I'm not sure what exactly you're doing, or how you can join two of them together though...

A double pole, double throw will let you join one circuit while turning another one off, and then vice-versa.

As far as how to "do it", i'm not sure what you're exactly doing. =-[

Jem Explorer

Jem

Posted
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Posted

hey,

yeah that's it, voltage over 85 & 86 joins 30 & 87, if there is no voltage over 85 & 86 then 30 & 87 are always connected..

basically the 200ma that my alarm supplies to work the door solinoid forward and backwards is not enough current to work it. there are only two wires coming out of the alarm to connect to the solinoid which i think is a pretty standard setup, to work the solinoid one way it suplies a current over these wires, and to work it the other way it inverts that current..

what i'm trying to do is wire in a relay so the solinoids have enough power open and close the door lock.. my problem is that by using a relay the solinoid will only work in one direction, as the relay kills the alarms ability to operate it in the other direction as the change in polarity won't go through the relay.. i think..

i remember seeing a way in a previouse alarm install done by somebody else where they had two relay's wired together to perform this task.. this is what i'm after :( any help would be great :)

cheers

Chris Rogers Grand Master

Chris Rogers

Posted
Posted

do this:

87 -+12v

87a - GND

30 - motor

85 -+12

86 - alarm

do both relays the same way and stick a 20A fuse on the supply.

what car btw. there may be a MUCH easier way of doing it :(

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