Cadillac Repair: 1985 cadillac coupe deville 4.1L, cadillac coupe deville, factory service manuals


Question
Sir,

I am going crazy trying to figure out why my air conditioner and fan stopped working....I would appreciate an idea as to which relay, switch or module it may be causing the problem....is it the module behind the left front headlight or something else?  Any advice on which item is causing this problem would be very much appreciated.......thank you again....

Answer
Hello,

First, before you start spending money chasing ghosts changing parts on a guess, you need to acquire diagnostic information for the vehicle. This could be a computer issue, modules, wiring and who knows what else.

I am going to reference a site for you that might be able to help with diagnostic information, that I make no money for sending you to this site. It is just a tool I use.
I had once given this site out and he came back screaming that he felt all information on the web should be free at at no cost to him--whatever.

Go to http://www.alldata.com See if your year, make, model is covered. If so, pay the $25.00 membership fee and you can download everything for a year. If available for your car, will go into the diagnostic measures so you are not wasting your time and money. Component locations, all the wiring, mechanical, from the factory service manuals is there.

Hope this will help you find your problem.