The connectors are keyed differently & cannot be reversed.
The static resistance can be ok & the solenoid can still be bad. They are a fairly problematic part. Test for infinite resistance between each terminal and the solenoid valve housing. If not infinite they are shorted.
Have you kept up with oil changes because oil viscosity plays a role in their performance.
It could also be a problem with the harness or connector but typically it's the solenoid itself that's bad.
Last edited by greenman; 12-20-2011 at 05:52 PM.