What is actually going on is the voltage drop across the Hall Effect sensor in the lock cylinder is not consistant. Installing a 2.2kOhm resistor between the BCM 5 volt out and security return will provide a constant voltage drop. 30 minute relearn and you are done. As you can see, I have researched what is going on and have fixed several this way. The one caveat is, if the car in question is an Impala or Monte Carlo, a failing ignition switch can mimic the same problem because one circuit on the switch drops supply voltage to the BCM. I was not ripping on your repair, just telling you how I do it. The resistor trick works on GM trucks, and all cars with the Passlock system.
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Today's Featured Article - Tractor Profile: Silver King - by Staff. Silver King tractors were produced by the Fate-Root-Heath Company of Plymouth, Ohio. The company was founded by John Fate in 1884 and was originally called the "J.D. Fate Company". After several mergers over the years, the final company name of Fate-Root-Heath came about in 1919. The first tractor produced was actually called the "Plymouth" tractor and was powered by a 20 HP 4-cylinder engine with a 3x4" bore and stroke. The four speed transmission had a top speed of 25 mph! After more t
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