is there another way, push button start.
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=122127
Printed Date: July 16, 2025 at 6:23 PM
Topic: is there another way, push button start.
Posted By: sti in detroit
Subject: is there another way, push button start.
Date Posted: June 03, 2010 at 2:40 PM
I installed a push button starter that requires no keys; it requires a 12v signal to activate, so I have it hooked to my alarm at the only wire that toggles when armed or disarmed, this wire is a (-) signal that when armed the wire puts out a -500ma, but when disarmed it is open.
So I hooked up a relay with 86 to 12v and 85 to my alarm trigger (-), then 30 to 12v and 87a to my push button starter enable. This IS working, but the problem is, when my car is off and alarm armed, the relay is always energized.
Is there another way to get 12v to my push button starter when alarm is disarmed without having a relay energized 19 hours a day?
Thanks
jim
Replies:
Posted By: sti in detroit
Date Posted: June 03, 2010 at 2:54 PM
basically i have it hooked up like this, where a relay is ezergized when armed.
https://www.the12volt.com/relays/relaydiagram10.html
so im assuming it is not a problem, or is it not recommended to have a relay ezergized all the time?
jim
Posted By: sti in detroit
Date Posted: June 03, 2010 at 2:55 PM
i take that back, now i see it is only on when ign is on....
Posted By: t&t tech
Date Posted: June 06, 2010 at 11:40 AM
Actually the way you described your connections, the relay will be active all the time the car is off and the alarm is armed, the diagram you posted is different in that it only will be active when the igniton is on and the alarm is armed! If you were to wire it like that you would have to turn on the ignition with the keys first and then activate the pushbutton starter (effectively defeating the purpose of the pushbutton)
-------------
COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF.
PSALMS 37:5
Posted By: sti in detroit
Date Posted: June 13, 2010 at 9:27 PM
you are exactly correct.
should i look into a low draw relay? is there a problem with a relay being energized all the time, other than the battery drain, i havent run into a dead battery yet, the car has sit for up to three days at one point, and did have any issues starting..
ideally, i need something that is wired to 12v constant and energized all the time, and then when i arm my alarm it would send it a negative signal and disengage said circuit.
thanks
jim
Posted By: oldspark
Date Posted: June 14, 2010 at 3:39 AM
Maybe use the NO (#87) contact instead and have the alarm energise the relay to disengage it.
Mind you, I think starter inhibits are close to useless. If you have a screwdriver or similar, and can open the bonnet, and .....
Posted By: howie ll
Date Posted: June 14, 2010 at 11:44 AM
bonnetXXXXhood..and put the screwdriver blade across the solenoid, ah Jaguars in the early 70s.
Posted By: oldspark
Date Posted: June 15, 2010 at 1:15 AM
And many many cars...
Posted By: sti in detroit
Date Posted: June 15, 2010 at 3:45 PM
oldspark wrote:
Maybe use the NO (#87) contact instead and have the alarm energise the relay to disengage it.
Mind you, I think starter inhibits are close to useless. If you have a screwdriver or similar, and can open the bonnet, and .....
what i really need is for my alarm to have a (-) signal when disarmed, but mine only has a (-) when armed.
what my push button starter is looking for is +12V to activate, or for me to be able to start the car, right now im using a relay for NC and it disenguages the push button so one will not be able to start the car when alarm is armed. if i use the #87 post it will be opposite of what i need, it will start when the alarm is armed, but wont start when its disarmed..
and its tough to use a screw driver when the ecu is looking for a chiped key...
jim
Posted By: t&t tech
Date Posted: June 15, 2010 at 6:42 PM
What type of vehicle are we discussing and what type of alarm? ------------- COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF.
PSALMS 37:5
Posted By: oldspark
Date Posted: June 15, 2010 at 8:47 PM
sti in detroit wrote:
... and its tough to use a screw driver when the ecu is looking for a chiped key...
That's the point - if you have ignition, you do NOT need a chipped key to start a car - a screw driver works fine in almost all cases (assuming you don't roll or push start).
Posted By: sti in detroit
Date Posted: June 15, 2010 at 9:31 PM
< size=3 face="Times New Roman">It’s a 08 Subaru STI, with a bull dog alarm-remote start, I installed.
< size=3 face="Times New Roman">
< size=3 face="Times New Roman">Most alarms I have done have an orange wire that has (-) signal when disarmed and ORANGE / white when armed. But I have checked, twice, this setup only has the ORANGE / white. This is also the only wire that toggles when armed or disarmed, all other wires are ing. Controlled, and this wont help.
< size=3 face="Times New Roman">
< size=3 face="Times New Roman">At this point ALL is working fine, my only issue is a relay constantly engaged when the car is off...
< size=3 face="Times New Roman">
< size=3 face="Times New Roman">
< size=3 face="Times New Roman">Thanks
< size=3 face="Times New Roman">Jim
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