1998 Buick Skylark Theft System light on won't start. I have no chip in my key, and it starts every time for months than randomly it won't start for a day or week.

SOURCE: Horn will not work on Buick Skylark 1998

the horn relay is located under hood in the fuse box

SOURCE: 1997 buick skylark theft system .

Hi....
Is common to see this problem with the theft system on chevys.
On your case I can figure out that the Computer is lossing the Pass code.
But this is due to a Bad pass lock sensor . The pass lock sensor is integrated in the Ignition lock cylinder.
The car will start After about 15 minutes. with the key In On position.
Because is about the time that the computer take to learn the Pass lock code. Exactly 11 min.

I recomend get the ignition lock cylinder checked for any inconssistence on the hardware.
The key some times bent. Or the small wires around the Lock cylinder damaged.
If everything is OK.. You will need to replace the Ignition lock cylinder , Before any control module...


Ok.. I hope this help on your problem.
Thank you for use fixya...

SOURCE: buick does not start when theft system comes on

I had the same problem with ours...

It ia a faulty ign switch lock (the sensor) > Expensive part >

Temp fix;

remove the cover underneath the steering column and locate the thin white flat (3) wire (runs from the ignition key lock down to a connector.

After starting the the car , dis-connect the connector under the dash that the Ign lock goes to , after that the car should start everytime.

You will need to replace the lock assy. if you want to fix this correctly ; I have been using ours for (6) months > no problem except the "Theft System " light stays on -

SOURCE: heater core replacement

LOCATION: You will find it inside the car , under the dash . Excuse me, in the CENTER of the car right above the Transmission tunnel.
PROCEDURE FOR REPLACEMENT:

Take the ashtray assembly out and remove the Glove Box and you will see a Black Plastic Box containing the Heater core. You may have to take apart the Lower dash on the Passenger Side. You will need a piece of pipe about 2" to 3"long that will fit inside the diameter of the two heater hoses at the firewall and two hose clamps.

1. disconnect the two hoses at the firewall;
2. slip a clamp on each hose;
3. slip the piece of pipe into both hose ends to connect the two hoses together;
4. install and tighten clamps on each end of hoses over pipe. (You might want to put a little grease on the pipe for easier removal when you are ready to install new core.)
5. Start engine and check for leaks at the connections.

Ricky Gittins

• 715 Answers
• Posted on Oct 22, 2009

SOURCE: 1996 buick skylark..alarm theft keeps flashin..try

Need a bit more information, Is the security light on, have you checked for spark and fuel pressure, just in case you did and know it is the passlock system then check this out, hopefully it will ansewer your problem, please rate your mechanics help.
have a great day. Sorry the pictures won't come up, but check out the site

GM Passlock I & II Information
Please study the following information carefully WHEN INSTALLING REMOTE START systems on a 1996 or later GM car or truck.
Introduced in 1996, GM has changed the VATS anti theft system to Pass-Lock system. This is a similar device to the VATS system, in that there is a resistor present during the start cycle. However, in the PASSLOCK system, the resistor has been placed inside the ignition switch, instead of the key. See the GM V.A.T.S page for more information.
To remotely start a car with this feature, you must bypass the PASSLOCK system. There are two methods of doing so.. The first, is to permanently bypass this system. This is the easiest method for accomplishing your task. The second way, is to temporarily bypass the PASSLOCK, by introducing relays into the system, which retain all of the features of the system, while allowing your remotes start module to bypass it automatically during a remote start cycle.
Vehicles effected
(1996 and newer): N & J body cars, such as
Pontiac Sunfire and GrandAm Passlock-1
Chevrolet Cavalier Passlock-1
Buick Skylark Passlock-1
Oldsmobile Achieva Passlock-1

1997 or newer
Chevrolet Malibu Passlock-II
Oldsmobile Cutlass Passlock-II

1998 or newer
All trucks , SUVs and Vans Passlock-II

It is important to pay special attention to the fact that there are many different ways of achieving the same goal. There are actually 2 different Passlock-II systems. On the next page, there are tests to establish which type of passlock-II your car has.

Relays shown are standard automotive 5 pin spdt relays, available from IEI.
A multi meter is required to measure the resistance values. Accuracy is important within 5%.

Once the value of the resistor is measured, a resistor of the same value +/-5% must be purchased (Radio Shack, for example). You can also use a Potentiometer (POT), which can be adjusted to the same value of the resistor in the ignition switch.

Passlock-I bypass procedure....

1: Remove the top and bottom shrouds from the steering column.
2: Find the 3 wire ribbon cable, coming from the ignition switch, containing White, Black, Yellow (Sometimes White, Black, Black). These are THIN wires.
3: Locate the Black 6 position connector on the LEFT side of the steering column, right above the ignition switch position. There is a BLACK (Thin) wire in this connector, called "Bulb Test", which shows Ground with ignition in the Off position, OPEN in the "Run" position, and GROUND in the "Crank" position.
4: Turn the ignition switch to the "Run" position. Do not crank the car.
5: Cut the Thin Yellow wire and strip both ends.
6: Without cutting the Black wire, expose some of the copper.
7: Using the ohmmeter, measure from the Yellow wire (the end coming from the ignition switch), to the exposed Black wire and record the value. Measure more than once to assure you have the right value.
8: Acquire the same size resistor and 3 relays, and perform the connections shown in the diagram below.

PASSLOCK-II bypass procedure

There are 2 types of Passlock-II systems. To determine which system you have, follow these instructions;

1: Locate two wires, which are THIN and are in the main ignition harness.. Orange/Black (or Black) and Yellow.
2: Cut the Yellow wire, and strip back some of the insulation from the Orange/Black (Or Black) wires.
3: Turn the ignition to the "Run" position ( don't crank the starter). Measure and record the value measured from the KEY SIDE of the Yellow wire, to the Black/Orange wire.
4: Turn the key to the "Crank" position and release. Now read the value again.
5: If the value changed, follow "Method#1". If the value stayed the same, follow "Method#2".



These diagrams are from our friends at ALARMTEK AUTO ALARM
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