Well ever have one of those days.

Yesterday was for me.

My 99 sits a lot in the winter, I do charge the battery and start it once a week.

Yesterday I let it run longer than usual temp got up to 226.
I did not hear the fans come on so I was going to lower the drivers
side window.
It won't go down.

1. On the window I am going to try the rap on the door while holding down the switch first.

2. On the fans, Is this noraml or do I have a problem.

3. Where do I begin to start looking to repair it.

The wierd part is everything worked fine last week.

Thanks for the help and advice.

 

The window motors develop rust or oxidation on the motor windings inside if they aren't used. This happens more to the passenger side than the driver's but in this case where its been sitting, it could happen there just as easily. Simply give a little push down on the window when you push the down button or rap it a few times. Usually they will go.
As for the fans, depending on the temp they are programmed for in your car they may not have come on at that temp. However, the easy way to insure they are working is turn on the AC. They should come on. Again, they too are electric motors and share the same basics as the window motors. Although I've never heard of it happening with the AC fans, it is possible due to the same cause. If you turn on the AC, hopefully the temp there isn't so cold that the BCM doesn't allow the AC to come on. Try the recirc mode and out of auto, assuming you have the auto ac head unit.

 

Thank you for your reply.

I went out to try the fix and now my battery is dead.

It's an Optima Red top. Less than 3 years old. Got it from Sams $99.00.

Took it over there ( like 60 mile trip ) they can't warranty it since I don't have my papers.

I always keep my papers except this time.

I guess I'm going back to something local. Napa battery with an acid pad.

Will let you and all know what happens after I install the new battery.

Thanks again.

 

I dont think the fans come on untill 228, someone correct me if im wrong...

 

Did you check for codes or any messages such as a "Charge SYstem Fault" on the DIC? Guess you would have said so if it was there. Obviously something drained your battery and I hear the Red-Top batteries are the best. Dumb questions or thoughts here...clean battery post connections? There's an internal circuit somewhere that will disconnect power from most all systems if say, the radio is left on, lights on and so on. I've tested that myself and it works. It will shut down the systems. I'm sure the BCM is still drawing a few milliamps which is nothing in the larger scale of things as it has to monitor the fob sensor input, door switch contacts and etc, but the battery should last a very long time with just that small amount of current draw.
Yes, its possible that you have a bad battery, but it would be the first time I've heard of one of these going bad like that. If these had an alternator, then I would suggest that you had a shorted diode in the alternator, but everything states that these have generators which is a different thing. I do not know if they just changed what they call it or if they really did change to an generator. The easiest thing to do, get it started and monitor the DIC voltage. Should read somewhere between 13.8 and 14.1 when fully charged and not a load on such as fans, brake lights and etc.. I have seen 14.3 at rare times and as low as 13.1 when stuck in heavy traffic with everything running and sitting at idle for a while...life on S. Calif. freeways

 

Thanks again for the reply.
The battery is dead.
Had it check at 3 places.

Good news is I found my papers and will get a replacement free.
The battery turns out to be 32 months old.

I have been having problems with it for several months now.
Always show 11.5 or lower ever after a 2 amp trickle charge.
And unless it was charged prior to trying to start was very slow turning over.
Alternator is putting out chg of 14.4.

I did get a message of LOW VOLTAGE when it did not start.

I should get the battery this afternoon and go form there.

I guess I belong to the Optima problem battery club.
But a free replacement is better than having to pay for a new one.

Thanks again will keep posted.

 

Got a free replacement battery.
Installed it last night.

All is working fine, fans come one, except still can't get the window down.

I read in my service manual that the regulator is sold as one replacement.

The manual says to remove the window glass, sure don't want to do
that unless I have too.

Is it possible to just replace the motor only ?

Thanks:

 

Hey dgrant3830.

The rap on the door worked today.

Got home from work when out and started the car
Opened the door and hit on it below the door handle 3 more times

The window went down.

I guess it use it or loose it.

I read a bunch of threads today at work.

One stated to not put the window up all the way when not it use.
Like leave a 1/4 of and inch. down. Said never had trouble again.

GM got the regulators out of adjustment and they will jam up.

At any rate I will open and close my windows each time I start the car from now on.

Thanks again for your help.
Great thing about this forum, someone has had the problem before and has an answer.

 

I heard that the simple thing works which is why I mentioned to you. Simply dirty contacts on the motor windings from non or little use. I wouldn't think you need to run them every day but probably once a week will normally suffice given whatever conditions you are in.