A Zilla Schematic would help both you and the Michael J. Fox Foundation. Your answer is also on page 36 of the Technical Information Manual. But here's my answer in reference to M:18:19. Power flows from fuse 10 to the A/C Mode Switch (6). I'm not sure if (7) is the cycling switch or if the cycling switch is really just (8) which is the low pressure switch. (My schematic does not show (8).) When the circuit is complete, ie. all switches closed, power is supplied to the coil of the fan relay (1) via the diode (10). Since the A/C is a CCOT, cycling clutch orifice tube, type the clutch cycles on and off via (7) so the fans should cycle on and off unless the otterstat circuit which supplies power to the fan relay (1) is on which would mean it wants to turn the fans on so power will be constant. By bypassing the otterstat (temp switch) you have proven that the rest of the cooling fan circuit works, including you fan fail bypass. You may have a bad otterstat or enough air in the system to prevent the heat in the coolant from activating the otterstat. You need to troubleshoot the A/C part of the circuit. Check for power at each part in the circuit that controls the coil of the relay (1). Obviously if your freon pressure is low that will keep switch (7) open and prevent both the A/C clutch and the fans from working....So I ask, Does the clutch activate?" Dave & 6530 Message: 11 Date: Fri, 21 May 2004 23:27:29 -0000 From: "graves_144" <graves_14@xxxxxxxxxxx> Subject: AC system and temp sensor both drop dead at the same time? Ok, so I'm driving around and want to put on the AC. I turn the mode switch and nothing happens. No click in the relay compartment and no cooling fans. Normally the fans will go on with the compressor. I look through the archives and find some info on diagnosing the temp sensor. Bypassing it turns on the fans. Apparently that is bad, so I need to replace that, but how can that be related to the compressor not going on with AC mode selected? Isn't that bypassed? I know it is bad because while messing with the car in the driveway it got above that line where the fans normally kick in. But again, that should be unrelated... I have the shop manual, but the darn circuit for the AC doesn't have the component names listed. Does anyone have that handy? This is page M:18:19. Is there a relay for the compressor clutch that could have blown up? I have the fan fail relay bypassed with the two fuse deal. Thank you, Dave "Just Say NO, to the COUCH POTATO!"® To see how go to www.tvpedaler.com [Non-text portions of this message have been removed] To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/