I have bought a 1986 505 SLi wagon to keep the 1984 STi company. Am now fixing up a few bugs before baby number three arrives.
On the SLi, there is a small manifold bolted to the rocker cover (the auxillary air control is bolted to it) through which runs coolant. This manifold has two temperature sensors in it - one with two connectors (a switch I presume) and the other with only one connector. Can someone please tell me if the second one is a temperature sender or a switch (say for a high temperature warning light)?
I want to test this unit to see if its OK. An ohmmeter indicates open circuit between the single connector and the manifold. I am hoping, therefore, that this is indeed a switch and not a sender! (Genuine replacement is $150!!! ).
I think the temperature gauge on the dash is controlled by the temperature sender screwed into the water pump (reads 3.5 kohms between connector and water pump).
Thanks in advance for any advice.