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About Rob Painter
Expertise
Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?

Experience
Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.

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Cadillac Repair - horn, lights will not shut off

Expert: Rob Painter - 11/5/2009

Question
hi
i have a 1984 eldorado birritz factory convertable mint condition today i started the car and the horn and headlights came on and did not shut off even after shutting off the ignition. i disconnected the battery and started again, start the car and the horn and lights come on. the car is equiped with a factory theft system and never gave me a problem before. this car is kept in a tempeture controlled garage. i do have electrical skills on gm cars. i took the light switch out to see if it shorted but the lights are still on the only way to shut them is to disconnect the battery and start again. what does the factory theft system look like and could that be the problem, can it be removed and still have normal operation of the lights and horn. i checked the firewall harness connection, fusable links,as well as any bad connections. this car is a show car with no (fake mechanics) touching it. thank you for your time hope you can help shawn.

Answer
Hello,

Everything is integrated so you are not going to bypass it. Pay the membership fee for http://www.alldata.com of like $30 and order the manuals on line for the car. The problem you may run into is that the converts were not made by caddy, but by a dealer in Texas at the time, so if there are some differences in wiring, you might be in trouble.

Don't feel bad, one of these days I will have problems with my 62K mileage 88'Allante convertible and that was made in Italy in 1988 and was discontinued in 1993.

Try going to all data--you will love what you get!

Rob

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