Here is a short video demonstrating a very quick and simple method for testing of the charging control circuit. Lamps are very handy for simulating a load for many basic function tests while examining individual components. This particular ecu is from a RAM truck which are commonly in the shop for repair for many different reasons.<br />...<br /><a href="https://www.youtube.com/watch?v=PmyBAWmOm5w" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=PmyBAWmOm5w</a>