Remote starter, 2 ignition wires?
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=87206
Printed Date: May 12, 2025 at 2:19 PM
Topic: Remote starter, 2 ignition wires?
Posted By: rack55
Subject: Remote starter, 2 ignition wires?
Date Posted: December 14, 2006 at 3:37 PM
I am installing a remote starter (Prostart ct-3100) on my 2000 Dodge Dakota. The truck has 2 ignition wires, but the remote starter only has one to use. I know that I need to connect to both ignition wires, but am not too familiar with the best way to do this, or how and where to make connections etc. For what it's worth, with everything hooked up except the 2nd ignition wire, I can remote start the truck, but it immediately shuts off (engine cranks and starts, but stops within 1-2 seconds). Can anyone provide me with some assistance? Thanks!
Replies:
Posted By: mobilecustoms
Date Posted: December 14, 2006 at 3:39 PM
you need 2 relays to hook up the ignition
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Posted By: rack55
Date Posted: December 14, 2006 at 3:43 PM
Thanks mobilecustoms. I have very little knowledge of relays and how to hook them up and use them, or even what to buy and where to get them, let alone where to put them.... I will have to do my research and learn about all of this... could you point me towards a website or resource that I could use to read up on this? I have read through the basic info on this site, but am looking for more of a "relays for dummies" manual I guess...
Posted By: mobilecustoms
Date Posted: December 14, 2006 at 3:51 PM
look in the relay and security forum in the search it will come up.
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Posted By: kgerry
Date Posted: December 14, 2006 at 4:14 PM
what color is the head of the key?? you may also have a transponder issue to deal with.......
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: splaudio
Date Posted: December 14, 2006 at 5:54 PM
is the key gray? if so u need a transponder...
Posted By: rack55
Date Posted: December 14, 2006 at 6:08 PM
The Key is black, so I don't think I have any issues there. Thanks for the help, looks like I'll have to figure out how to use relays to get this working. Appreciate the replies.
Posted By: bbtaco
Date Posted: December 14, 2006 at 6:29 PM
You need a relay wired like this.
Pins 86 and 87 fused 12 volt constant
Pin 30 2nd ignition wire in vehicle
Pin 85 Ground out when running wire from your Prostart module
Posted By: rack55
Date Posted: December 14, 2006 at 8:33 PM
bbtaco wrote:
You need a relay wired like this.
Pins 86 and 87 fused 12 volt constant
Pin 30 2nd ignition wire in vehicle
Pin 85 Ground out when running wire from your Prostart module
Where do I connect the first ignition wire? It sounds like I need another relay, but I don't know how and where that would hook up...
Posted By: rack55
Date Posted: December 14, 2006 at 9:10 PM
Can anyone take a look at this and let me know if it will work, or if I am completely missing it... Relay #1: 86-connected to ignition wire from remote starter 87-connected to 12v constant 85-to 2nd relay (86) 30-to ignition 1 in vehicle Relay #2: 86-from 1st relay 87-connected to 12v constant 85-ground 30-to ignition 2 in vehicle
Posted By: bbtaco
Date Posted: December 14, 2006 at 9:50 PM
rack55 wrote:
bbtaco wrote:
You need a relay wired like this.
Pins 86 and 87 fused 12 volt constant
Pin 30 2nd ignition wire in vehicle
Pin 85 Ground out when running wire from your Prostart module
Where do I connect the first ignition wire? It sounds like I need another relay, but I don't know how and where that would hook up...
Hook the ignition wire from your rs to the first ignition wire in your truck. Use a relay wired like my previous post and connect it to your vehicles second ignition wire. Do you have the tach wire hooked up and learned by the rs unit?
Posted By: rack55
Date Posted: December 15, 2006 at 7:43 AM
Awesome, thanks alot bbtaco! That makes sense, I was under the impression that I needed 2 relays, and was trying to figure that out. But I see what you have described, perfect... Final question, just want to make sure of this: can I just tie in the 12v constants to the power wires (fused) at the ignition harness? Thanks again, this has been a great help!
Posted By: bbtaco
Date Posted: December 15, 2006 at 10:28 AM
That should be fine.You can connect the 12 volt constant wires going to the relay together and use one fuse.Make sure you use large enough gauge wires. I use 14 ga. wire.
Posted By: splaudio
Date Posted: December 15, 2006 at 5:17 PM
i have always done this 85 - from ground when running 86+ jumper from ur ignition 87+ fused 12v 30 + output to ur 2nd ignition
Posted By: splaudio
Date Posted: December 15, 2006 at 5:20 PM
the way i wired it u can also do the 2nd starter or 2nd acc wire...
Posted By: rack55
Date Posted: December 17, 2006 at 8:43 PM
ok.... So I set up the relay as bbtaco described, but it did not work. With the relay connected, my radio immediately turns on, and the remote starter still does not work... it will crank and start, but immediately the engine will stop. I'm sure I have some wires wrong here, what does it look like I've done?
Posted By: rack55
Date Posted: December 17, 2006 at 8:43 PM
ok.... So I set up the relay as bbtaco described, but it did not work. With the relay connected, my radio immediately turns on, and the remote starter still does not work... it will crank and start, but immediately the engine will stop. I'm sure I have some wires wrong here, what does it look like I've done?
Posted By: rack55
Date Posted: December 17, 2006 at 9:14 PM
"Pin 85 Ground out when running wire from your Prostart module" I just grounded Pin 85 to a metal surface, is this correct? I don't understand what "running wire from your prostart module" means...
Posted By: roadworks
Date Posted: December 17, 2006 at 9:50 PM
rack55 wrote:
"Pin 85 Ground out when running wire from your Prostart module" I just grounded Pin 85 to a metal surface, is this correct? I don't understand what "running wire from your prostart module" means...
no you cannot ground pin 85 to a metal surface. the relay will always be activated.. on the the multi wire plug you will see a whit wire.. I believe it is pin 10 (Ground when running).. that is where you should be connecting pin 85 to..
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