clutch bypass question
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=61354
Printed Date: April 28, 2024 at 12:10 PM
Topic: clutch bypass question
Posted By: adambeazley
Subject: clutch bypass question
Date Posted: August 15, 2005 at 12:56 PM
Hello,
I know this is a taboo subject but I dont care. I have implimented some safety in my setup so Im not woried about leaving the car in gear and remote starting it, because it wont start. Anyway, my question is about bypassing the clutch. What type of relay should I buy from radio shack to accomplish this? And how should I bypass the clutch in a 2006 scion Tc? A diagram or a really good description would be great.
thanks in advanced
Replies:
Posted By: dare_ds69
Date Posted: August 15, 2005 at 6:37 PM
use a SPDT clutch has 2 wires when you press the clutch both wires are conected so you have to do is this: 87 goes to one wire at the clutch 30 goes to the other wire of the clutch 85 goes to negative when remote start 86 goes to ignition. try to use the NSS is good and safe for manual trasmitions. ------------- how own your mind, control your life.
MECP certified. always use a DMM
Posted By: endless talent
Date Posted: August 15, 2005 at 7:21 PM
The clutch has two pin switches, one that senses the clutch is being pressed and one that senses if the clutch is all the way down. The first is to deactivate the cruise control while driving and the second is for starting the vehicle. The second pin switch is the one you will be interfacing with. I prefer to bypass it this way: Rather than unplugging the factory switch altogether, and keep it functional, wire up a regular relay to leave the factory clutch pin output connected, unless remote started, where it will "see" the correct input from the other wire without actually being pressed. To do this, you will need to identify which wire is which on your pin switch. There will typically be one wire that ALWAYS rests at GROUND and one that will change state to GROUND when the clutch is depressed all the way. Be sure to test the switch with the ignition ON (and MOST DEFINITELY WITH A DMM) in the case that it may be different from when the ignition is off. Cut the wire that does NOT rest at GROUND far enough away from the switch to make a secure connection. Connect the side of the wire closest to the clutch to "87a" (normally closed). Connect the other side, which goes to the BCM or some other factory module to "30" (common). Tap in a wire, without cutting it, to the always GROUND side of the switch and connect it to "87" (normally open). It's not such a good idea to connect any other source than the constant side of the switch, because of the possibility frying a module somewhere. Send 12V power to "86" and your remote start status output to "85" and your in business. This method is as dependable and safe as thay get. -------------
Posted By: dare_ds69
Date Posted: August 16, 2005 at 6:42 PM
YOU DON'T HAVE TO CUT no wires to by pass the clutch. if you know relays you will see that the 87 and 30 are normally open circuit, so once you make R/S both wires are going to conect together.  ------------- how own your mind, control your life.
MECP certified. always use a DMM
Posted By: fpcelica
Date Posted: August 17, 2005 at 12:17 AM
where do u buy relays? and what do you call them if you were to ask someone... locally
Posted By: adambeazley
Date Posted: August 17, 2005 at 12:51 AM
Well fpcelica from what I have found it looks like this relay would work ok.
https://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F011%5F002%5F013%5F000&product%5fid=275%2D248
And please if this is not the right relay someone please let me know.
thanks
Posted By: fpcelica
Date Posted: August 17, 2005 at 1:28 AM
i think that would work but i think you want the normally sized kind not the mini im not really sure
Posted By: endless talent
Date Posted: August 17, 2005 at 1:56 AM
By the way, dare_ds, you are correct, the method you posted is more straight forward than mine. I had a brain fart plain and simple...  But my way will use ONE more female connector and 6 inches more wire to help keep the business going!! -------------
Posted By: dare_ds69
Date Posted: August 17, 2005 at 6:32 AM
you can go to pepboys or autozone and get the relay. or get from https://parts-express.com ------------- how own your mind, control your life.
MECP certified. always use a DMM
Posted By: adambeazley
Date Posted: August 17, 2005 at 11:51 PM
cool thanks for the help guys.
One last question is what amperage should this SPDT relay be rated for?
thanks
Posted By: endless talent
Date Posted: August 19, 2005 at 12:45 AM
Most standard relays are rated for 30/40 amps. Those will work fine, since the application will not need anything near that to work. Even a mini-relay would work, and they are rated for something like 10/15 amps. With either relay, when you connect your "86" to ignition power, I would recommend fusing it around 5 amps (relays can "throw" with less than a couple hundred milli-amps) in order to protect the ignition circuit---you're better safe than sorry. If something were to ever come lose and ground out, you would be a lot better off temporarily losing the ability to bypass your clutch than blowing a Maxi-fuse under the hood and losing the functionality of pretty much everything. -------------
|