Help with Fiat Strada Problem 1.7 TD 2005

Hello everyone, Diego; I was something important to me that is to check the status of the ground connections, from the engine to the chassis, and the negative engine of Ba
Teriay the same negative battery terminal (which does not find sulfatation). With the negative of the Tester to battery mass it measures the voltage that exists to the chassis and motor, I do not know if you understand me, the teencia drop values ​​must be small, generally low 0.15 V of fallen from dough tension is considered a good connection. Greetings

Thank you! Look I did this measurement with the closed contact, I did not even put the keys, from the positive terminal to the cable that feeds the spark plugs and marks the battery voltage, from negative terminal to the cable that feeds the spark plugs marks me 0V, with contact on negative terminal to the cable that feeds the spark plugs, it marks the battery voltage!

Hello everyone, Diego then there should not be the problem, continue with the diagnosis, you are well aimed, encourage and luck. Greetings to
all.