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Cadillac Repair/1988 cadillac coupe deville horn


My horn doesn't work but my radio still comes on. I can not find the fuse for the horn in the fuse box and I also noticed that there are 4 horns. Please help


You need to get to at least one horn so you can put a test light on the connector. Have someone press the horn button on the steering wheel. If test light comes on, horn is junk. Try on the other three if that horn lit the test lght. They were located where debris could get in them and burn them out.
If no power you need to look further. If t&T steering column, there are issues that need to be addressed, however you need to pull the huh panel (black plastic) from beneath the dash. The turn signal wire switch is located at the side of the steering column. Not the two top connectors at the top of the column. They are for the ignition switch. You will need to check the web for the color of the horn wire at th t/s switch. Check with test light if no power, problem is in column if all fuses are good Look at your owners manual to make sure there are not multiple fuse boxes!

If you get all that checked and no power, write me again because you will be going on a steering column expedition! LOL


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Rob Painter


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?


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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