Review on 🏎️ Painless Performance 80111: Superior Replacement Diode Assembly for Race Car Switch Panels by Jason Taylor

Had to buy one of these for a 1978 Jeep CJ5. After years of using the same ACDELCO alternator (GM type) and without any problems, the replacement caused feedback through the ignition. Internet searches mentioned using a diode and indeed the problem stopped. If your starter works after the key is turned off, the battery drains when all accessories are turned off - this is the solution.