tach wire voltage?
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=64528
Printed Date: May 02, 2024 at 6:13 AM
Topic: tach wire voltage?
Posted By: dougie109
Subject: tach wire voltage?
Date Posted: October 17, 2005 at 1:03 PM
is there a way to make your alarm know the tach voltage? mine is coming back around 12-15 voltz is this what is it expecting or am i sapposed to program the unit? ive placed the tach wire to the casing of the spark plug wires and it worked PREFECt for the first 2 times. then afterwards it stopped working. the spark plug wires changes voltages so i dont beleive its proper to place it there? i drive a 2000 focus wagon se i gota a carvox king eagle alarm system. any help would be great.. thanks again Douglas
Replies:
Posted By: dougie109
Date Posted: October 17, 2005 at 2:23 PM
ok i tested 1.0 voltages ac.. still the starter keeps starting afterwards.. is 1volt to low? the book said it needs to be between 1-6. is there a way to fake for like 3 voltz to test it?
Posted By: dougie109
Date Posted: October 17, 2005 at 2:32 PM
so your saying the problem cant lie on the tach speed? what else could be causing the starter to reengage even after the engine is idling?
Posted By: dougie109
Date Posted: October 17, 2005 at 2:42 PM
im testing right from the wire from the distribuator cab... from where all the spark plug wires come from. the injector signal is 1.0ac as well.. exactly the same...
Posted By: dougie109
Date Posted: October 17, 2005 at 10:01 PM
no its a little while attached to the distribuator cap.. it is the proper one.. i feel that its not putting out enough to hit the 1 volt ac.. is there a way for me to FAKE like 3 volts to test it? cause the charge from the battery is 12 voltz dc.. any help to resolve this problem would be great... regards Douglas
Posted By: dougie109
Date Posted: October 17, 2005 at 10:15 PM
perfect. ill see if i can find it tommorrow.. so its sapposed to change .. or is it sapposaed to stay at 1 volt when its at idle correct.. and as the rpms goes up so does the voltage... douglas
Posted By: mo12v
Date Posted: October 17, 2005 at 10:19 PM
dougie109 wrote:
ive placed the tach wire to the casing of the spark plug wires and it worked PREFECt for the first 2 times. then afterwards it stopped working. the spark plug wires changes voltages so i dont beleive its proper to place it there? i gota a carvox king eagle alarm system.
Does your " CarVox " instruct you to WRAP the wire around the Spark Plug Wire?? ( some R/S do )
Or does the TACH wire hook to a TACH Signal?? ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: dougie109
Date Posted: October 17, 2005 at 10:24 PM
well see that is where it got interesting.. i says to peel the wire from the tach wire and bind it together.. but i put put it onto a spark plug wire and it works for 3 times starting.. then all of a sudden stopped... i really dont get it.. but just happened.. this is where it puzzles me the most.. i thought that if i gave it a 3 v current and it works... then i can applify the power.. but i sappose not cause you are completely right.. if it calls for the tach wire.. thats what its sapposed to get
Posted By: mo12v
Date Posted: October 17, 2005 at 10:28 PM
dougie109 wrote:
but i sappose not cause you are completely right.. if it calls for the tach wire.. thats what its sapposed to get
Still need to know if the Instructions want you to WRAP the wire around Spark Plug Wire or hook to TACH Signal?? ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: dougie109
Date Posted: October 17, 2005 at 10:34 PM
"High-Voltage sensing or Tachometer input " "connect to the vehicles tach wire" once again.. thanks alot for all the help Douglas
Posted By: dougie109
Date Posted: October 17, 2005 at 10:35 PM
also "the correct wire shows between 1 to 6 v ac and fluctuates with the idle of the engine"
Posted By: mo12v
Date Posted: October 17, 2005 at 10:37 PM
Splice into BLACK / Green @ Coil & program for TACH if needed
Also don't forget Immobilizer
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MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: dougie109
Date Posted: October 17, 2005 at 10:37 PM
however the books does say oil sensor signal ( default) ? but the place that installed it connected to the tach wire so they said
Posted By: dougie109
Date Posted: October 17, 2005 at 10:47 PM
how do i program for tach? the books doesn;t seem to cover nothing about this? what does the immoblizer do? black /green is what? fuel injector? Regards Douglas
Posted By: tragik
Date Posted: October 18, 2005 at 1:17 AM
Bobk is right. You have the wrong wire. Look at the injectors. There will be two wires coming out of each one. 1 of these wires will be the same color at each injector. The other one ill not. choose the odd color, and test it. If your meter has the ability to check frequency, set it on that. The frequency will go up with RPM's. Don't worry about the voltage. 1 volt is fine.
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Northstart.....or start it your damn self.
Posted By: dualsport
Date Posted: October 18, 2005 at 10:13 AM
Quote dougie109
well see that is where it got interesting.. i says to peel the wire from the tach wire and bind it together.. but i put put it onto a spark plug wire and it works for 3 times starting.. then all of a sudden stopped... i really dont get it.. but just happened..
Did you wrap the alarm wire around the spark plug wire, but instead connected it directly at the terminal?
If you did, that would probably damage the alarm's sensing circuit- Wrapping it around the high tension wire would allow the circuit to pick up the pulses of the ignition through induction, but connecting it directly would subject the circuit to thousands of volts, which I doubt the alarm would be able to withstand- Hopefully that wasn't the case..
Posted By: dougie109
Date Posted: October 18, 2005 at 4:21 PM
tragic. you were right.. put it to the black of the spark plug wire... measured 2.6 when it started.. enough to turn off the starter... works great now.. would just like to personally thank all of you for all of your thoughts.. i app it soo much.. thanks again Douglas
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