Should this thing be unplugged?

[matt2491]

New (to me) M1152A1, this thing is in the engine bay, right in front of the driver. It's been unplugged since I got the truck. Google says it's a 'time delay module' for the cooling fan.

Truck seems to run and drive fine. Should I leave it unplugged or plug it back in?

 

[fuzzytoaster]

It should be plugged in otherwise the fan will operate constantly leading to slower acceleration, more wear on components, worse MPG, and other issues.

 

[Mogman]

You need to test/troubleshoot the fan system, it is likely it was unplugged because there is a problem causing overheating.

 

[matt2491]

Ok, I did some more reading and have a good idea how to test the system.

On a related note, why is there what appears to be clear silicone gooped on various hose fittings? I thought maybe it was just some shade tree stuff going on with my truck but I see it in pics of other trucks too. See the hose attached to the gold colored Cadillac valve...

 

[Mullaney]

Ok, I did some more reading and have a good idea how to test the system.

On a related note, why is there what appears to be clear silicone gooped on various hose fittings? I thought maybe it was just some shade tree stuff going on with my truck but I see it in pics of other trucks too. See the hose attached to the gold colored Cadillac valve...

.
Sealing out the weather...
The USMC coats everything in clear silicone.
Other branches do as well - for protection from sea water.