Truck starts and runs fine everything works after about 30 seconds it dies and horn goes off. Always starts back up and runs for same amount of time and then same thing. It's not a fuel problem, it's taking power away from coil, If you hot wire coil it will stay running but horn goes off after 30 seconds. Anyone have this symptom?
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Thanks Scott, there is a black module under there that I believe is an engine shutdown module, but don't know how to check to see if it is bad and it's $1000 to replace, I also don't have a wiring diagram to see about troubleshooting
What l remember is this truck is a little old by today's standards some were built with a powertrain protection system and some were put on aftermarket there was a small black box under the dash covers the wiring went to the main components that cause the engine to fail if something went wrong like low oil pressure or no oil or water problem like overheating it would shut down the spark and the horn would blow. Check to make sure that all your fluids are good and you do not have low oil pressure. if everything is good there could be a problem in the system. Might be able to disable it but l do not have wiring diagram..
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