1987 DeVille. This is electrial part, between the fan control relay
and the fan control module (Red 14G wire in/out). The schematic shows
it to be a solenoid, and I assume the bolt that secures it to the frame is its' ground but I don't have a clue to it's function.
Filter? Whatizit filtering?
I've been chasing a telltale-light problem for a long time: "Coolant Temp/
Fan" telltale light will illuminate immediately after turning the AC
system On. Once the car reaches about 40mph the light goes
Off.....each/every time. Same happens in slow traffic/idle/etc.
40mph is the key apparently, so I don't understand if it is a air-flow
problem, or this 'fan control fillter assembly' unit is the cause.
Telltale does not come On in Econ mode...ever. I've chased the down
grounds and done the diagnostic tree procedures and all is correct.
If anyone knows anything about this FCFA, I'd sure appreciate knowing
what it does. Nothing at all about it in the SM and the ACDelco guys
don't have in in their books. The number on the unit is: X1631939.
Plugging that number in gives no response. I'm stumped. Thanks for
any 'light' anyone can shine on this FCFA

 

Hereis some SM info

[IMG]local://upfiles/1516/44C1B83145054AB3AA897343B00D2D72.jpg[/IMG]

[IMG]local://upfiles/1516/FA12564EBE21411C9DAEAA5EEEFB4320.jpg[/IMG]

 

OK, found out what it does. Electrical noise filter. Not the cause of my problem. Need Fan Control Module. Hope I dan find a good used one, because I sure can't afford new...

Thanks

 

Replaced Primary-fan motor and then found a good used module. System cured! No F41 code/no telltale light at idle or low-speed. Next is to heal oil-leak problem.