mechanic1 Posted July 6, 2014 Share #1 Posted July 6, 2014 Question.....the ground wire on the top of the T connector for coolant that the fan switch is in.....is that ground wire for the fan or for the gauge...or what? Oh...on '86 RV. Link to comment Share on other sites More sharing options...
mechanic1 Posted July 6, 2014 Author Share #2 Posted July 6, 2014 ...anyway....I had such a hard time plugging that thing back in....My wife has some "bullet" connectors that were the same size so I made a longer wire for it. So now if I ever have to take it out again the wire is long enough it won't unplug on me....sure hope it isn't a calibrated resistence type wire. ???? Link to comment Share on other sites More sharing options...
Condor Posted July 6, 2014 Share #3 Posted July 6, 2014 Question.....the ground wire on the top of the T connector for coolant that the fan switch is in.....is that ground wire for the fan or for the gauge...or what? Oh...on '86 RV. For both. The sensors need a ground and the 'T' is isolated from the frame, hence the ground wire... Link to comment Share on other sites More sharing options...
Neil86 Posted July 6, 2014 Share #4 Posted July 6, 2014 On an 86 you have a 2 wire thermoswitch (to operate fan) so the ground wire is for the temp gauge circuit. On earlier Ventures with a single wire thermoswitch it grounds both the temp sender and thermoswitch. Link to comment Share on other sites More sharing options...
mechanic1 Posted July 6, 2014 Author Share #5 Posted July 6, 2014 That is kind of what I was thinking....since it is a single speed cooling fan....figured one wire of the two was ground for the fan...and the mystery wire was ground for the temp sensor/gauge...but, finally at my age I have come to realize that it is a lot easier to ask than to fix what you mess up...lol Link to comment Share on other sites More sharing options...
Neil86 Posted July 6, 2014 Share #6 Posted July 6, 2014 The two wires on the thermoswitch are power supply in, and power out to fan motor, no ground at the switch. The fan motor has a ground wire. The earlier single wire thermoswitch grounded the fan relay coil to operate fan (no relay on the 2 wire design). Link to comment Share on other sites More sharing options...
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