If you are using a filament style test light and there is enough to keep the lamp on then you have an awesome draw. Find the box that's still warm. Plus you need to let the truck go to sleep. When first turned off or when first reconnected through the testlight the amperage will spike because your waking up your modules.
You really need a digital meter and about 30 minutes to let the thing just sit, while connected and measuring then after 30 minutes look at what the draw is. If it's over .050A then start pulling fuses.