Eliminate wiring headaches on your engine test stand. You can also troubleshoot your engine wiring with the engine installed in your car. Crank the engine over to check compression, check for oil leaks or strange engine noises before you install the engine. Also monitors the oil pressure for most engines with a oil pressure sender switch. You can also check the function of your alternator or generator output with this control box. (External voltage regulator must be present to troubleshoot charging circuit but not needed to run the engine) This will work with Ford and Chevy V8's, Outboard motors, motorcycles, and many more vehicles