Our info says when the coolant gets low enough, the coolant level switch opens, no continuity between the terminals at the switch. The yellow wire with black tracer is voltage to the switch from the instrument panel cluster, I believe it goes hot with the key on. The black wire at the connector is ground, just a chassis ground.
I'm not sure how much voltage is on the yellow wire with black tracer? The black ground, you can test the usual way, testlite connected to voltage, touch the terminal for the black wire, if the lite comes on, the ground wire circuit should be ok.
Check instrument panel trouble codes or any applicable codes. Some of the national brand autostores will check codes for free. I just don't know if they can check manufacturer specific codes?
Sunday, March 23rd, 2014 AT 2:57 PM