jeff73

Does anybody know how to check the continuity between the pcm and the harness? Can I go from the pigtail at the ac pressure sensor to chassis ground? Will it show anything with a meter and will it hurt anything? I am not getting any ac pressure on my tuners primary table. I need the fans to come on when the pressure gets to about 300psi but the ect is not high enough to command the fans. I have the 5v signal at the sensor and it also changes with pressure. All wiring is good in the harness.