I made a cheap and dirty for my '84 GMC... A 12 volt buzzer horn from Radio Shcck and a 3 amp (or more) diode. Wire in series and hang between a ignition terminal and the light terminal on the fuse block. If it sounds when it shouldn't then reverse the leads. Here's what happens: Ignition and lights off - no voltage - no sound. Ignition on - lights off - diode prevents current flow - no sound. Lights on - ignition on - same voltage, no sound. Lights on ignition off - SOUND - current flows from lights through sounder and diode and grounds back through ignition circuit (somewhere). Should be able to find empty terminal for lights and ignition right on fuse block.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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