I think he meant P0412 (AIR pump).

[edit] WOW, 3 posts at 10:30!

 

Now for what it is worth it
My ORIG PCM got lost by PCM4less
He replace my PCM with A4 Y body PCM with programing of Fbody
My scan Tool is for Hyper Tech II 96/97 F body

 

Swap they relay with Fog Lamp
FoG lamp works with Coolant Relay
Fuse Swap with Horn
Horn works
Reset the DTC
All those 3 DTC came right back
P0412
P1641
P1642
Now AC Fan also not comming along.
I was to do hand turn the Fan
Couldn't reach the Engine one. Had to lift the car up or take Intake Tubing out.
Any other hints???

 

What are the chances of Both AC fan and Coolent fan to go bad.
I have notice AC Fan is also not comming along.
I am thinking off of Coolent Fan is out; at least AC Fan should come on? right ?

 

What is the part you are calling the "AC fan"? do you mean the blower motor for the AC/heat/vent system?

 

Sorry
I am talking about raditaor (Front of the car) Fan which is right next to Engine Coolent Raditor Fan

 

There are two identical fans on the radiator. They are both for engine cooling and should come on at the same time (94-97s). If one is not running, then it's dead or not getting power.

 

But
I thought....
One for AC cooling and one for Engine Cooling
errrrrr what I know
BTW BOTH are NOT RUnning

Now Next Question, for testing purpose can I wire up directly to see if the motors on Fan is good ?
and I guess I can also put Ohm meter (In Voltage checking Mode) to check the voltage comming in or not ???

 

Does over car have Linkable Fuses
Only Fuse I know is Side of the Driver Side Car?

 

Look as Shoebox's wiring diagrams. They are the same as far as the fans are concerned. There is a fusible link in the circuit. Yours will be like the "late production" diagram:

http://shbox.com/1/1995_pcm6.jpg

 

Pull fan relay #1 and jumper between D1 and D4 in the slots. That should turn on the low speed fans. That should prove your fans capable of running.

The only difference in the diagram and your car is that power to the fan relay coils is present all the time and not switched with the ignition.