I just replaced the battery and plugs in my 89 2.8 and now the security light on the dash comes on and off intermittently. Anybody got an idea???

 

check and see if you battery clamps are tightend down
mine comes on when the battery looses connection

 

Need more info... Does the car still start? The security light is linked to the VATS system. It could be a worn key, worn lock cylinder, etc... Usually if the light comes on and stays on the car won't start at all. When the key and lock start to wear you'll have intermittent problems. Sometimes a new key will fix it other times it requires both pieces be replaced. Or you can build a resistor pack and bypass the key all together.

 

it still starts up and runs the light just stays on. am i gonna have any issues down the road if i dont replace the key or ignition cylinder?

 

sorry to hijack but mine never comes on

 

The light shouldn't come on unless there's a problem with the vats. I wouldn't give it too much thought till the car stops starting. You might cleaning the pellet on your key, trying another key if you have more then one available, or disconnect the battery for a minute or two and then reconnect to see if the problem goes away. Might not be a bad idea to read up on bypassing VATS and make yourself a resistor pack that you can use to bypass the key if it turns into a problem, so you don't end up stranded.