Laodicea Posted March 5, 2008 Report Share Posted March 5, 2008 Can I replace the two prong sensor for the dash temp guage 88-89 with a single prong and still have the dash gauge work by using the yellow/blue wire only? I dont want to spend $90 bucks for a stupid two prong sensor. Link to comment Share on other sites More sharing options...
Technology Posted March 11, 2008 Report Share Posted March 11, 2008 I also want to know what I can use because right now all I've got is the ecu temp sensor for my MPI setup, and I need a gauge sensor that will work with the stock gauge, but be new and plentiful, like a GM sensor! Link to comment Share on other sites More sharing options...
Subnova Posted June 2, 2008 Report Share Posted June 2, 2008 Can I replace the two prong sensor for the dash temp guage 88-89 with a single prong and still have the dash gauge work by using the yellow/blue wire only? I dont want to spend $90 bucks for a stupid two prong sensor. WHOLE COW!! $90?!?!?! I got mine for WAY cheaper than that at Advance Auto. But I'm having problems with it though. My gauge doesnt read. Link to comment Share on other sites More sharing options...
RichyQuest87 Posted June 4, 2008 Report Share Posted June 4, 2008 My 87 has both connectors in the wire harness (1 prong 87 style and 2 prong 89 style). I dont know if the 88/89s have the 87 style 1 prong connector though. Link to comment Share on other sites More sharing options...
mikec Posted June 6, 2008 Report Share Posted June 6, 2008 My 88 doesn't have the extra 1-prong connector... though most 87s do have an extra as Richy noted. The "other" prong on the 88-later 2-prong sensor is an on/off switch; it flips when the coolant temps get warmed up a little bit. This feeds the interior a/c-heater computer so it knows "okay, there's heat in the coolant, switch on the interior heater if the driver asked for it." On cold days/cold engine startups, you'll note the interior heater starts in DEFROST mode, with the fan blower pretty much OFF... then when the engine warms up a little bit this switch tells the computer to go ahead and start putting warm air on your feet. Just ground this wire if you buy the one-wire sensor... and you'll have to manually turn the heater on/off to avoid cold air on your feet. The auto tranny overdrive might also monitor this switch on the later cars; if so you'll have O/D on a stone-cold engine. mike c. Link to comment Share on other sites More sharing options...
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