Fan consant run connector

[JetspeedCamry]

While hunting around at the back of the engine with the wiring loom, i found this little plug. It has 2 wires, (Black w/ red stripes) and a cap on it to "connect" the two together. After disconnecting this little cap, i found that when the key is turned to "Ignition/Run", both thermo fans stay constantly on. Replacing the cap returns the fans to normal "thermo" operation.

Heres a pic of the little plug:



So yeah, just a question as to why this would be needed? What purpose would it serve? Really hot weather?

Cheers.

[TurboRA28]

A lot of toyota fans the switch/relay is designed that if the switch dies, or power to relay then the fans turn on. Better than not having them run at all I suppose.

So maybe disconnecting this plug you are somehow cutting power to the relay?

[STR8 2.8]

could be a type of check connector, though they usually just have one plug you have to short.

[Robbos_Toyotas]

yeah toyota fan switches run a normally closed switch, therefore if the switch fails, the fans come on automatically by default - a safety thing i guess...

id leave the plug connected. I think you'll find, if you have that connected, then disconnect the thermofan sensor plug, they'll turn on constant too...if that all makes sense??

Blake

[JetspeedCamry]

yeah toyota fan switches run a normally closed switch, therefore if the switch fails, the fans come on automatically by default - a safety thing i guess...

id leave the plug connected. I think you'll find, if you have that connected, then disconnect the thermofan sensor plug, they'll turn on constant too...if that all makes sense??

Blake

Yea makes sense. Good engineering to have a failsafe in there! And yea, its connected (or else the fans run constant!) so just wanted to know what it was!