pats bypass recommendations

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ants_s2

Copper - Posts: 51

Joined: August 20, 2006

Location: United States

Posted: April 09, 2007 at 12:08 AM / IP Logged

I hooked up my Code Alarm CA670 alarm in my Expy with a DEI 555P and it just doesn't seem to work right. I used the right alarm trigger wire but it seems to trigger it too early. do you have any recommendations? Which have you had best luck with? How is the Code Alarm PKF1?

I really DON'T want to take the pellets out of the keys or stick a blank key in the car. I just don't think that is the right way to do things.

Twelvoltz

Platinum - Posts: 2,384

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Joined: March 24, 2005

Location: New Jersey, United States

Posted: April 09, 2007 at 8:08 AM / IP Logged

What problems are you having exactly with the 555P? When you say it triggers too early, how? DEI is not listing the manual for a 555P, so I can not verify but doesn't it hook up using the data wires in the vehicle? The data wire hookup is the most reliable, and is the same as the PKF1.

First, post the exact model and year of your 'expy' then explain the exact problem and sequence of events and someone here may be able to assist you in fixing the problem.

Installer, IT support, and FFL. I need less hobbies.

ants_s2

Copper - Posts: 51

Joined: August 20, 2006

Location: United States

Posted: April 09, 2007 at 10:50 AM / IP Logged

2000 Expedition.

The 555P does hook up to the data wires. I've programmed it correctly. What seems to happen is when I turn on the remote start, the ignition turns on and it for about 3 seconds. As soon as the ignition goes on, the light on the DEI 555 goes on, which I'm assuming means the PATS signal is being sent.

Then the remote start starts to crank the car. As it is cranking, the theft light on the car flashed rapidly and the car does not start.

I've read other posts that say the DEI 555 often does NOT work.

mikvot

Gold - Posts: 1,043

Joined: December 19, 2006

Location: Missouri, United States

Posted: April 09, 2007 at 11:30 AM / IP Logged

You have the bypass hooked up to the blue/black (-) 500 ma active out of the code alarm? The module should turn on as soon as you activate the remote start, and will shut down 4 seconds after the truck is running.

ants_s2

Copper - Posts: 51

Joined: August 20, 2006

Location: United States

Posted: April 09, 2007 at 3:21 PM / IP Logged

Yeah, I am using the blue/black status wire which is what it says to use in the manual.

The remote start turns the ignition on for about 3 seconds before it actually cranks the engine.

As soon as the ignition goes on, the LED on the 555 goes on, so by the time it is cranking, the light is already off. This doesn't seem right, is it? I would think the light should be on when the car is cranking?

enice

Silver - Posts: 857

Joined: March 05, 2006

Location: New York, United States

Posted: April 09, 2007 at 7:45 PM / IP Logged

it seems like you do not have the input wire connected correctly, the light should turn on as soon as you try to remote start the vehicle. Also make sure you have a proper ground on the 555P. I know an installer should not really use a test probe in a alarm/remote start nstallation but if you know how to use it you should test that wire and see if the blue/white wire is getting a ground signal as soon as its remote started. That would phase out the issue with that connection and may isolate it to the 555P.

enice

Silver - Posts: 857

Joined: March 05, 2006

Location: New York, United States

Posted: April 09, 2007 at 7:59 PM / IP Logged

Just to add more to the problem you are having I read the manual on the 555P which is actually the same as N555P for Twelvevolts and read that you must make sure you ground the black wire properly because it may cause the 555P not to work properly(DO NOT USE a ground wire on the immobilizer harness). Also the input wire is the blue wire. Like I mentioned before you should check that connection first.

ants_s2

Copper - Posts: 51

Joined: August 20, 2006

Location: United States

Posted: April 09, 2007 at 10:29 PM / IP Logged

Enice-

The 555 is grounded to the same point as the alarm ground- the body. I am using the correct blue input wire too.

I'm not sure what you meant when you said " you must make sure you ground the black wire properly because it may cause the 555P not to work properly(DO NOT USE a ground wire on the immobilizer harness)". First you said that you need to make sure you have a good ground, then you said do not use a ground wire? Can you clarify?

enice

Silver - Posts: 857

Joined: March 05, 2006

Location: New York, United States

Posted: April 10, 2007 at 10:31 AM / IP Logged

On the factory harness there is also a ground. I just wanted to clarify not to use the ground on the harness. You made it clear that the ground of the 555P is connected to the alarm ground so next i would definetly check the input blue wire. Another way to test it is by using a multimeter. You could connect the red lead using(DC voltage) to a constant power source and connect your black to the blue wire. When you try to remote start the vehicle it should give you 12 volts right away if it doesn't then either you have the wrong wire or the wire is not programed properly on the brain of the alarm. I mostly work with DEI alarms so I really wouldn't know on the Code Alarm Side. On DEI alarms you can program that wire which is blue/white seperately if you use that wire. That wire is also a defrost but I use it as a input wire. Sorry for confusing you on the ground part. I was talking about the factory immobilizer harness

ants_s2

Copper - Posts: 51

Joined: August 20, 2006

Location: United States

Posted: April 10, 2007 at 12:57 PM / IP Logged

No worries on the confusion. I am clear now.

I think the problem may be that the 555 is sending the signal too soon. Again, MAYBE that is the problem.

When the remote start goes on, it first turns the ignition on for about 3 seconds- you know, the fuel pump goes on, gauges turn on, seat belt chime, etc. As soon as all the stuff goes on, the LED on the 555 goes on.

THEN, the car actually cranks over. By the time it cranks, the LED on the 555 is already off.

Should the LED on the 555 be on while the car is cranking? I guess that is my main question: if the timing on the 555 is right?

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