Motor will not turn with spark plugs in.... Headscratcher
#13
#15
Right , then with the same procedure (leaving the red probe on the positive terminal of the battery) place the black probe firstly on the nut closest to the battery of the starter relay and crank again, then on the furthest nut of the starter relay and test again , we need to find where the resistance is
#18
If its the factory Specs should be ok, that's why we are trying out the cables from the battery to the Starter Motor for resistance, a cable might not be performing as it should, (broken wires at terminals , solenoid) resistance will kill the amps needed, but if this test proves ok we can look further
#20