Thanks for your efforts Mr Jamroz, it's the full testing of sensors using multimetre but by my humble knowledge the best reading from signal is with Hrz (ohm) because the MAIN purpose from a SIGNAL is to express the CONTINUITY(the flow) and best in KOER
The ground probe was did not have good contact. It was kind of loose at first I thought the battery was going down because the lights were on and I didn't have a battery mentainer. The test results were off forcing me to check the ground.
You're correct but not every manufacturer uses 12V. This is a typical case where a 5V is used instead of 12V. The 5V is boosted up by the sensor circuitry. I appreciate your contribution. Keep the comments coming