Okay so I purchased a keyless entry system from eBay it is an unbranded model with no manufacturer information on it. I understand the instructions on how to install it however the problem I am having is determining the positive or negative door lock trigger on my 2000 Dodge Ram off road Edition. I probed my door lock wires with a test light the first test I put the Probe on a negative and probe the wire while operating the switch there was no light in either position I switched the probe to a 12-volt positive and repeated the test when I touch the wire the test light will illuminate and when I operate the switch it goes out so is this saying that it is a a negative trigger?