relay for actuators shorting
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=59459
Printed Date: May 01, 2024 at 8:19 PM
Topic: relay for actuators shorting
Posted By: mrkastro
Subject: relay for actuators shorting
Date Posted: July 14, 2005 at 10:26 PM
hello there. i'm installing some actuators and were installed according to this diagram. when i connect the 87a to ground both relays short. please help and clarify what is going on. thank you.
Replies:
Posted By: boulderguy
Date Posted: July 15, 2005 at 1:51 AM
I'm no relay pro, but at first glance it looks like they're not symmetrical. On the rt side, try making 86 your neg output & 85 the batt+, or vice versa on the left side. -------------
Posted By: auex
Date Posted: July 15, 2005 at 3:31 AM
Are you absolutely sure you are using SPDT relays as opposed to SPST? The middle pin would be labeled 87A for SPDT and 87 or 87B for SPST.
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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: mrkastro
Date Posted: July 15, 2005 at 3:13 PM
i checked the relays and both are 87a....... now one of them is really old but kept in good storage.... the other i just purchased in one auto parts store.... i checked each one individually... then disconnected all other prongs, just connecting the 87 to 12v 87a ground and they short. i can tell they are shorting coz everytime i run ground the dome lights dim badly..... please add your input. thanks.
Posted By: auex
Date Posted: July 15, 2005 at 4:49 PM
The problem is that 87 and 87A cannot connect to each other, it is not possible unless the relay is really badly blown. Do you have a meter with continuity? Also, try disconnecting 30 and see if it still happens. Does the relay get warm/hot?
Just as a background question, have you ever installed actuators before? What type of actuators do you have 5 wire or 2? Hopefully you have 2 wire. If 2 wire, are both wires coming off of the actuator going directly to the relays and not getting pinched or shorted anywhere?
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: mrkastro
Date Posted: July 15, 2005 at 11:18 PM
.... i installed as the diagram states.... then i unplugged all other prongs leaving the 87 12v and when i grounded 87a this happened.... the dome lights that were on dimmed... like if it was drawing alot of current from the battery.... and as you aked if they get any warm.... the wires get hot.... they are 2 wire actuators...and i was sort of bench testing the actuators... i havent run the lines yet for them.... all what i was doing was testin before get the install further. i've installed actuators before but its been awhile... i haven't installed an alarm for about 4 years... i even forgot what direction a diode works (shame)
Posted By: mrkastro
Date Posted: July 20, 2005 at 2:24 AM
ok guys... today i received some relays i bought from parts express....... and i tried this again and it WORKED FINE.... the original relay i was using i bought at an auto parts store.... here's what i compared on the AUTO PARTS relay against the PArts Express..... the auto parts relay \ 87a._____.87 86 \ [] --------------- \ 30 85 so with this freaking relay the 87a and 87 are together while the 30 rests away from 87a....... now the parts xpress relay shows the same diagram we have in this page's relay "how to" section. thanks again for your help.
Posted By: mediashock
Date Posted: September 06, 2005 at 11:23 AM
Hey mrkastro
I had the same exact problem?? but i used two brand new relays from a big chain store... they looked cheap though.. i dontk now why but they shorted ..
so you got another set of relays and it worked? any specific brand?
cause i wasted like 5 hours trying to figure this out this weekned and after that i was soo frusturated and gave up
Posted By: ringojam
Date Posted: September 06, 2005 at 11:35 AM
You guy s neeed to stop buying cheap relays and buy proper brands such as bosch 
Posted By: mrkastro
Date Posted: September 06, 2005 at 1:44 PM
you can go to partsexpress and buy the relays they have.
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