electronic trunk release

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rdgfx32003

Member - Posts: 21

Joined: January 11, 2013

Location: Texas, United States

Posted: January 11, 2013 at 2:37 AM / IP Logged

I'm installing an electric trunk release in a 1993 Toyota MR2. The vehicle has a Car-Pro CPX-3600 alarm. I've had the solenoid for a few years. I just never installed it. It's a universal kit and all

I have is the solenoid and the mount.

I've mounted the solenoid where I want it but I'm not clear on whether I'll need a relay or how I should wire this up. The only information I have is from the Car-Pro CPX-3600 installation manual and all it states is that the blue wire from the 9 pin mini connector wire harness is for the negative input for a trunk release.

What do I need to know to make this work? Thanks.

kreg357

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Joined: January 30, 2009

Location: Pennsylvania, United States

Posted: January 11, 2013 at 5:52 AM / IP Logged

Most add-on trunk release kits come with wiring and a push button switch. The solenoid should

have two terminals / wires coming off of it. One will connect to chassis ground and the other will

supply it with a +12V when the solenoid is to be actuated ( trunk popped ). This +12V lead is usually

fused at 10 Amps. Your CPX-360 Trunk Release output is a low current negative pulse that is designed

to control a relay. Obtain a 30/40 Amp SPDT relay with harness and wire as follows :

Relay Pin 85 to CPX-360 Trunk Release Output

Relay Pin 86 and Pin 87 to +12V fused at 10 Amps

Relay Pin 30 to positive lead of trunk release solenoid.

Additionally ( IHOH ), please add a quenching diode ( 1N4007 ) across Relay pins 85 and 86 with the

band towards pin 86.

The negative lead of trunk release solenoid is connected to a solid chassis ground.

Soldering is fun!

KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: January 11, 2013 at 8:26 AM / IP Logged

I'm not familiar with that line of alarms but make sure it is a trunk release OUTPUT not a trunk release INPUT that you are connecting.

Kevin Pierson

rdgfx32003

Member - Posts: 21

Joined: January 11, 2013

Location: Texas, United States

Posted: January 12, 2013 at 10:04 AM / IP Logged

kreg357 wrote:

Most add-on trunk release kits come with wiring and a push button switch. ...

Relay Pin 30 to positive lead of trunk release solenoid.

Additionally ( IHOH ), please add a quenching diode ( 1N4007 ) across Relay pins 85 and 86 with the

band towards pin 86.

The negative lead of trunk release solenoid is connected to a solid chassis ground.

Thanks, that's what I needed. But what is (IHOH)?

kreg357

Platinum - Posts: 7,785

Joined: January 30, 2009

Location: Pennsylvania, United States

Posted: January 12, 2013 at 3:05 PM / IP Logged

IHOH = In Honor of Howie II electronic trunk release -- posted image.

A seasoned forum member that always reminds us to protect the systems with proper diode usage and placement.

Soldering is fun!

rdgfx32003

Member - Posts: 21

Joined: January 11, 2013

Location: Texas, United States

Posted: January 13, 2013 at 12:37 PM / IP Logged

Aha. IHOH.

This drew my attention.

KPierson wrote:

I'm not familiar with that line of alarms but make sure it is a trunk release OUTPUT not a trunk release INPUT that you are connecting.

On further inspection, it turns out it is a negative input.

kreg357 provided me with guidance for a trunk release output type.

Relay Pin 85 to CPX-360 Trunk Release Output
Relay Pin 86 and Pin 87 to +12V fused at 10 Amps
Relay Pin 30 to positive lead of trunk release solenoid.
Additionally ( IHOH ), please add a quenching diode ( 1N4007 ) across Relay pins 85 and 86 with the
band towards pin 86.

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rdgfx32003
Member - Posts: 21

Joined: January 11, 2013
Location: Texas, United States
Posted: January 13, 2013 at 12:44 PM / IP Logged
Oops I posted before I was through, sorry.

My last post was going to finish up with a request for info for negative input wiring.

On the installation sheet it's described as: Trunk Trigger (-)input.

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rdgfx32003
Member - Posts: 21

Joined: January 11, 2013
Location: Texas, United States
Posted: January 13, 2013 at 1:09 PM / IP Logged
I'm going to revise again.

The kit came with the wiring and a push button switch. Those items are lost and all I have is the actuator and mount. The actuator isn't marked which side is positive, but I don't think it will hurt it to get it wrong the first time. It will either be released or unreleased and I can switch the wires on the actuator if it's wrong, I guess.

I downloaded the installation manual for the CPX-3600 a few days ago and now I can't find it online for ####! I find the operations manual but not installation.Good thing I already downloaded it.Stumps me as to where I found it before.

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kreg357
Platinum - Posts: 7,785

Joined: January 30, 2009
Location: Pennsylvania, United States
Posted: January 13, 2013 at 3:14 PM / IP Logged
As Kevin pointed out, there is a difference between a Trunk Release Output and a Trunk Trigger Input.
The Trunk Release output is to pop the trunk. A Trunk Trigger input is for the CPX-3600 to detect when
the trunk is open.   The relay described earlier is to be used with the Trunk Release Output, the relay
and actuator solenoid. If your CPX-3600 is an alarm system and has a separate Trunk Trigger Input wire
you would connect that to the MR2's trunk trigger wire. Typically, if the vehicle came with a factory alarm
system, there should be a trunk pin somewhere. Here is the wire info from Ready Remote :
Trunk/Hatch Pin    RED / Green (-)      @ theft ECU     It is a (-) signal, so a direct connection is OK, no relay
required. An alternative trunk trigger signal would be the trunk light, if equipped.   I don't see any wire
listed, so use a DMM to test & verify.
Soldering is fun!

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rdgfx32003
Member - Posts: 21

Joined: January 11, 2013
Location: Texas, United States
Posted: January 14, 2013 at 7:17 AM / IP Logged
I took the liberty of uploading the CPX-3600 installation manual and the operation manual to the12volt.

I did some research on the car and found out it did not come with a factory installed alarm.

I'm not sure how to proceed now, since there was no factory alarm.I don't know where to pick up an output signal. Another reason I uploaded the docs was for some kind individual to examine the install sheet and hopefully prevent me from burning down the car. :-)

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