? wire...

[mechanic1]

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.

[mechanic1]

...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.

 

????

[Condor]

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...

[Neil86]

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.

[mechanic1]

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

[Neil86]

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).