If it happens, you look for ways to help prevent it in the future
Leaving your headlights on and coming out to find a dead battery
I picked up a universal (Lights On Buzzer Kit) from NAPA # 782-1637
I didn’t like the fuse taps and alligator clips in the kit. I prefer to splice the wires into the wiring system. There are other universal buzzer kits out there and most of them are similar on how they work. They consist of two wires, buzzer, and a diode that prevents it from buzzing if power (+) is connected to the black wire and negative (-) to the red wire. You can test that the diode is working just touch the red wire to the positive terminal on the battery and the black wire to the negative terminal on the battery and it will buzz, then reverse the wires on the battery and it will not buzz.
There are many ways the buzzer could be installed in the wiring system as can be seen by the installation instructions in the below picture. I decided to splice into the headlight (14 LT BLU 10) wire at the fuse block and the oil pressure switch (20 DK BLU 31) wire at the fuse block (see below wiring diagram). Note not all of our trucks have the oil pressure warning light circuit.
Having the wiring harness out of the truck it was easy to find and identify the wires I wanted to splice into down at the fuse block Just used the double back tape in the buzzer kit to attach the buzzer to the side of the fuse block.
Some of the most common terminals & splices used are insulated (Red wire size 22-18, Blue wire size 16-14, and Yellow wire size 12-10). A friend of mine always wanted to barrow my aircraft quality crimping tools to get good quality crimps on his wiring work. The normal automotive crimping tools will work but there not as consistent in crimping. The aircraft quality crimping tools are very expensive but give good consistent crimps. We did find a crimpier that worked well and is reasonable in price, the Ratcheting Crimping Tool by Central Forge # 97420 at Harbor Freight. A tool you might want to consider if you’re doing some wiring.
More wire harness cleanup is required but the buzzer is installed
Enjoy your build