I've looked through Chilton's manual but can't seem to identify what this wire actually is (The thicker blue one that's spliced into). I know it deals with the ignition but I was wondering if anybody on here knew exactly what, or if they had a diagram of this connection. Thanks

 

dunno, but you might want to get the factory service manual and look in the electrical / ignition section...

 

I think that blue wire is the RPM Signal wire. Where is that Spliced wire going to? RPM gauge?

 

yes that thing is rpm signal.
later on the day, when i get home i will look in my book, and let u know exactly where it goes. unless someone else does it already.

 

Roger that, RPM it is.

 

It's part of the ignition cut off for my alarm, it will stop the engine from being started but not cut the car off like it should in the middle of driving (Clifford Blackjax). So are you guys saying the way it cuts the engine is by opening the circuit in the alarm brain of the RPM switch, so the car can't actually start because of no "rotations"? Versus the alarm killing the ignition contact somehow? Thanks for your help guys.

 

That wire is a direct RPM signal for Tachometer,

 

no, it's just an rpm signal.

my guess is that if the alarm is seeing an rpm signal (engine running) it won't cut ignition...maybe?

 

If I don't enter the code (People with Blackjax know what I'm talking about) the siren will go off but not cut the car off, but if I turn the car off manually after not entering the code just to stop the siren, then when I try to restart I get nothing, not even trying to crank over, just dead. I'm trying to understand what wire the place that installed it tapped in to because it doesn't shut the car off in the middle of driving like it should. (I'd rather not go back to them). I was also trying to determine if it just grounded something out to kill the car (assuming it worked correctly) or if it opened a circuit. With just 1 wire coming from the splice point, it couldn't open the circuit, so I was thinking it grounded some signal out. Unless that wire travels back to the brain of the alarm and it opens the circuit in there. Sorry, I know it's getting complicated now, just trying to understand this. And I don't have the wiring diagram anymore.

Edit: Does anybody have an idea of what I could splice into that if "killed" while the car was running, would cut the car off? Like fuel injectors or something. I figured that blue wire was the starter or something, since if disabled wouldn't start the car, but if disabled while the car was running, wouldn't cut the car off since the starter isn't always "engaged", it turns the car over and that's it.

 

I seriously doubt that it would ground that wire in order to shut the car off, it's just an rpm signal to the let box know the car is running. That's my guess without a wiring diagram.

 

FWIW, I have Blackjax and it didn't involve cutting and splicing into the dizzy. That looks rigged.

 

first of all, you need to read up on how the blackjax anti-car jacking feature works.

It DOES NOT shut the motor off while the RPMS are higher than a set RPM. (Imagine a car-jacker who jacked your car is driving on the freeway and it killed the motor; OR if you accidently set it off on yourself and it killed the motor)

All that is in your picture is a tap into the tach signal to let the blackjax "brain" know the RPM. If set correctly it will shut the motor off if the motor is idling (stopped at a light or sign). The "brain" breaks your ignition/ strarter wires.

The siren blarring (lights flashing) is to bring attention to the car while its driving at speed; causing the jacker to slow down or stop, than it will kill the motor once the RPMs is at idle.


From what you describe, You need to go back to the installer and have them set the RPM learn on the blackjax unit.



Modified by t at 10:30 PM 3/22/2005

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by t &raquo;</TD></TR><TR><TD CLASS="quote">From what you describe, You need to go back to the installer and have them set the RPM learn on the blackjax unit.</TD></TR></TABLE>

From the looks of things (vampire tap and spade connector), you should have the blackjax installed by professionals.

The place who originally installed the unit are hacks, at best.

 

Ooooooook. Thanks for all your help guys, I really appreciate it. I read about the feature in the Owner's Manual and it says nothing about RPM's being the causing factor of killing the engine. It says in the manual when the theif slows down for a stop light or to take a turn it will shut off the engine, so when I tried that and nothing happened I began to wonder if the place even hooked it up to the correct wire, hence me posting a picture and asking exactly what wire they spliced in to. Now, I didn't come to a complete stop and idle but I will try that tonight to see if anything different happens.
Problem with having professionals install it is that nobody sells the alarm anymore, and without the wiring diagram (I never had it) nobody will attempt to install it. At the time this place still sold the alarm so they could pull a diagram out of a new box for installation.
I know it's a hack job but if anybody has this alarm and wants to send me an e-mail telling me of a better wire to splice into, please do so. I put my CD Player in, bolted the header and exhaust on and set up the MSD ignition system myself so I'm sure I could change that splice point if I knew of a better location. But other than that, I do appreciate all the answers from you guys. Thanks for helping me out.

 

you can use the Tach test connector on the rear driver's side firewall. it's at the back on the firewall near the "hood prop rod". should be a single connector and a single blue wire coming out of it.. look near the Clutch Resovior..