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Old 11-10-2013, 04:23 PM
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sixto sixto is offline
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,806
Are the 3-pin and 2-pin on the head casting itself or on the part the upper radiator hose attaches to? If they're by the upper radiator hose, those would be the EDS temp sensor (2-pin) and aux fan trigger/compressor cutoff switches (3-pin). The gauge sender is likely by the #2 injector. Question is, is the single pin sensor by the thermostat an afterglow relay sensor or a 50*C temp switch for the transmission vacuum amplifier. The answer depends on whether your car has a transmission vacuum amplifier (round blue plastic thing with lots of vacuum lines) or an after glow relay (small connector has 4 pins).

87 300D
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