78deville Posted December 15, 2007 Report Share Posted December 15, 2007 1978 sedan deville. No heat blowing. Replaced blower motor, still nothing. Checked for power to blower motor but there was none, so i checked the fuse, but it was not blown. Checked power to the fuse block and it was good...so my question is what is between the fuse block and the blower motor that would cause this? is there another relay or something? Link to comment Share on other sites More sharing options...
KHE Posted December 16, 2007 Report Share Posted December 16, 2007 You really need a wiring diagram to properly troubleshoot the problem. The system will not activate the blower motor until the coolant temperature reaches a certain temp. Have you run the car long enough to warm up the cooling system? The Climate control module could be bad but without a wiring diagram, I would not suggest changing it at this point. Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
Maximln Posted December 16, 2007 Report Share Posted December 16, 2007 It is very common for those temperature switches to go bad. They just screw into the motor. It's just one wire. Unplug it and ground the wire. That should fix you up. Max Link to comment Share on other sites More sharing options...
KHE Posted December 16, 2007 Report Share Posted December 16, 2007 See this thread - KevinW describes the 77-79 climate control system. http://caddyinfo.ipbhost.com/index.php?showtopic=16155 Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
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