I am sure this has been worked thru before but can't find a way to search the threads.

I have a 2002 f150 4.6 Triton v8 with AC clutch not activating. I have the Haynes manual but I am finding the electrical doesn't seem to be accurate for this model.

I started with following the diagrams in the Haynes book by making sure I turned the key on set to max ac then verified I had 12v at the over pressure switch (pass side in front) and at the cycle switch on the accumulator, I jumped the cycle switch pins but the ac clutch relay would not activate.

I verified the fuse 5 (15A).
I swapped the 204 ac clutch relay with 205 horn relay and the horn worked before and after but still no ac clutch.
I jumped the 204 ac clutch relay contacts to try to activate the clutch and it did click (did not run because truck is only in power on not motor running condition.
Tried to do a continuity check from the output of the cycle switch and the 204 ac clutch relay had ~ 600 Ohms resistance .... so I removed the ground on the battery and opened the fuse box but the wire colors did not match the the diagrams or what was on the cycle switch.
Without having accurate diagrams I am in trouble now. Can anyone out there give guidance? I don't see any connection with a computer module and I do not have any codes stored.
I also did test D502 the ac clutch diode.

So I know the
over pressure switch is good
cycle switch is not the problem
ac clutch relay and diode is good
ac clutch is good.

This is obviously wrong...


but the ac clutch does not work driving down the road. what am I missing and does anyone have a diagram that is more accurate than the Haynes book?

 

If it was mine I would unplug the connector at the AC clutch solenoid, bring it up where you can handle it and connect a test light or meter to the plug. Start the engine and set the controls to where the AC compressor should come on. See if power is being sent to the AC clutch. You should get light or a voltage reading. p.s. a click from the solenoid does not necessarily mean that the clutch magnets are being energized. Could be the clutch magnet windings. (p.s. 2 I might not know exactly how that solenoid and clutch work. Just saying that a click might not tell the full story.)

I read through your post but don't see that you showed whether or not you had power to the clutch when you should have it. Might be in your words but it's not clear. If you're getting power then the problem is in the clutch solenoid. If you're not then it's on the power supply side.

You didn't say either if it's ever worked correctly for you. Good luck.