04 grand am security light

I just installed the an avital 4200 remote start/alarm with the 555L. When i goto start the car with the key it does nothing, but when i reconnect the yellow wire it starts fine. So i reconnected the yellow wire with the bypass module installed then seperated the yellow wire and now the car will start fine with the key and wheni remote start, but the security light now comes on. I thought it might be the bypass module so i exchanged it with like 2 others, but it doesnt want to do anything till i rehook the yellow wires together and seperate them.

So it's prolly the 555L that's messing up all together?   What 'bout that new passlock 3?   Is it a possibility that this vehicle might have that? I never heard of the pldata since my boss lady just now wants to carry just basic DEI brands.

Just curious, are you talking about the code wire or the starter wire when you said that the key wouldn't do anything? I have had a couple of the 555L bad out of the box but not 3 in a row.

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Certified Security Specialist
Always check info with a digital multimeter.
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Talking 'bout the yellow passlock wire.

Ok, the car has the passlock 2 system i was mistaken sorry. So what should i do now?

Get the PLDATA if you want a module. Or you can use a relay and a resistor.

Pin 30 goes to computer side of cut yellow passlock starter wire

Pin 87a goes to the key side of the yellow passlock starter wire.

Pin 87 goes to one side of the resistor and the other side of the resistor goes to the black passlock ground wire

Pin 85 gets ground out when running from the RS

Pin 86 goes to the Ignition wire.

To measure the resistence, start the car then cut the yellwo passlock starter wire. Strip back the key side and strip back an inch of the black passlock ground wire. The put one DMM probe on the key side and the other on the black wire, then reverse the leads and get a resistor withing 5% of the higher of the 2 resistences.

If you use this method, you will need to make sure to turn the key to start before hitting the break to turn the RS off or else the theft light will turn on. There should be a factory anti-grind feature so there is not need ot install one.

This is actually very easy to do. But like I said use a PLDATA if you can. The install only requires Power, ground, ground out when runninf from the RS and then a single connection to the data line at the OBDII connector.


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J Rilla

Owner/Installer

well i cant get the pldata so i'm stuck with using the DEI brand. it's really starting to annoy me that this thing doesn't want to work right. I even went through and rechecked all of my wire connections to see if i might of messed something up. So I need the help from someone ASAP.

Use a relay and a resistor then like I suggested.

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J Rilla

Owner/Installer

A couple things...Where are you picking up the passlock wires? Also the black wire off of the 555L should go to the thin black wire up at the cylinder running with the yellow passlock wire..Do you have it connected to that wire? Also make sure you have the wires right as far as which one goes to the keyside of the cut wire and which one goes to the other side. Double check all your other connections on the 555L..make sure it's getting power/ignition/and a (-) out on the blue/black wire. Violet and BLACK/ white you don't need. Your using the yellow and BLACK / YELLOW wires to interupt the yellow passlock wire correct? I know sounds basic, but a lot of times it turns out to be the dumb stuff that's right in front of your face..

Yep, everything is going to the right places and held in place with solder then taped then has a ziptie over top of that to make sure it really stays put. I've heard from some people that there's a difference between the 4 cylinder and the V6 grand am's, something 'bout the computer is different between the cars, is that true?

We decided to try the PLXR bypass module from bypass kits.com and it's still doing the same exact thing. Could one of the ignition wires not be energizing like it should and thats causing it to not want to start correctly? Any help now will be really nice and helpful.