Question about 2002 Pontiac Grand Prix
I had a problem where after I started the car the DIC, DDL, and Fan would all shut off. Initially it would recover in 1-2 minuts. Within 2 days it would no longer recover, but would recover if I put the fan on 5. Finally, they stopped completely and putting the Fan on 5 makes not difference anymore.
When the key is first turned to "On" but not started the DIC goes through it's Diag process and then shows the normal display, the fan work, and the Daytime Driving Lights are on.
Then as soon as I start the car, they all fail. It is pretty much a hard fail now but once in a while it I wait a minute or two with the key on before starting, then it will work, but this is rare.
Any idea's, I have hunted the net and it seems potential answers are all over the place for problems of this nature but I have not seen anyone say they have solved it.
It got the problem fixed thanks to several posts on here with similar problems. It was the Ignition Switch, an open contact to be exact. Turns out all sorts of stuff routes through that "switch" as it is not really one switch but a bunch of contacts and cams that engage them as the key is in different positions, when GM decided to route through it and what not to is a real mystery to me, some makes sense, most don't and it is clear it is as confusing to their mechanics as to anyone else.
Thanks to the members and contributors of Fixya, who knows how long it would have taken and how much it would have cost if not for the information I was able to give them that I found here.
Posted on Aug 14, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
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How does Vehicles Engine cooling system works? http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html
------------How to Replace Engine cooling Fan:-- http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-engine-cooling-fan-on.html
-----------Replace Fan Relay but still Radiator cooling fans not working? http://schematicsdiagram.blogspot.com/2011/12/replace-fan-relay-but-still-radiator.html
----------DIC says "COOLING FAN FAULT"? http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
---------Where Is Radiator Fan relay and Fuse Located?
This will help.
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