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Message: [QUOTE="CATDiezel, post: 1427853, member: 4387"] Battery testing is rather simple. If they load test then so be it. Anything above 12.6v is considered good. This sounds like a noise issue from either a failed light or diode causing meniscus return voltage and one of the modules is detecting it as a signal input. Please disconnect all accessory lights and start from there. Anything lighting not stock. A certain frequency from any transformer on one of the light bars. Or even LED lights could easily cause this. Ever powered up a very high frequency and watted radio near sensitive equipment. It's the same ordeal. It's noise generated on a communications path and it causes the silicone chip to loose it's mind. The same can also be from an accessory with a transformer without a shielded ground to carry or direct noise away. If a power wire is "dirty" or u shielded and also sitting next to mod bus or can comms it can inherently put generated false signal on the line. Anything with a transforming generator should have a diode sized properly to stop these issues. In the case of light bars it should be a zener diode if a regular diode proves insufficient. Either that or a isolated clean 24v power supply along with a shield ground. (Terminate the shield on one end only or your simply adding a ground that is not capable of carrying stray noise and loose voltage) I could be wrong but you don't have either a battery or connection problem. You have a module that is unhappy. Just try unplugging all aftermarket lighting first and see. However if a light caused this issue it is highly possible to fry the new module. Remember it's just a delicate silicone chip and the wrong frequency can nuke it... although it's protected by a series of diodes and resistors. It happens all the time. Especially if the noise is incoming and not outgoing. [/QUOTE]