Went out to the garage this morning and heard the blower motor going. I couldn't get it to stop, so I pulled the maxi-fuse. The battery was too dead to start the car, so I have it on a charger. If anyone out there knows what the problem is I would appreciate the info before I have to take it in at noon.

 

If you have dual zone/auto a/c its most likely the blower motor controller. I'm pretty sure its located right next to the blower motor. The blower motor is located right behind the glovebox, just drop the plastic panel under the dash on the pass side and you can get right to it. Be careful, the metal case on the blower motor is hot so dont short it to ground. you can just unplug the motor to stop it until you can get to the dealer. If you are out of warranty you can change the controller but it may be other things causing it.

If you have manual a/c it could be a few things as well, if you are out of warranty we can go from there...

 

Thanks, kp. I'm a '97, so out of warranty, but I'll probably go ahead and take it in. I have the dual zone, so the controller must be the problem.

 

The controller is easy to change, let me see if i can dig up the p/n.

 

Blower Motor Always On CJ2
DEFINITION: Blower motor is on at any selected speed.
1 Was the blower motor system check performed? -- YES - Go to Step 2 NO - Go to HVAC Blower Control (CJ2) System Check

2 Disconnect the HVAC programmer module connector.
Turn the ignition switch to the RUN position.
Is the blower motor on? -- YES - Go to Step 3 NO - Go to Step 4

3 Turn the ignition switch to the OFF position.
Disconnect the blower motor control module connector.
Connect a test light between terminal C of the blower motor control module connector and a known good ground.
Does the test light illuminate? -- YES - Go to Step 5 NO - Go to Step 6

4 Replace the HVAC programmer module. Is the replacement complete? -- Recheck System Operation --

5 Connect a test light between terminal B of the HVAC programmer module connector and a known good ground. Does the test light illuminate? -- YES - Go to Step 6 NO - Go to Step 5

6 Locate and repair a short to B+ in CKT 63. Is the repair complete? -- Recheck System Operation --

7 Replace the blower motor control module. Is the replacement complete? -- Recheck System Operation --

---

Could be the programmer as well (its a bank of vacuum switces and relays) but I would bet its the fan control module, if you arent comfortable doing this take it to the dealer :)

BTW, control module pn 52479971 - 140.00 list if you want to guess :)


[Modified by kp, 9:27 AM 7/31/2002]

 

Thanks kp - I think even I can try this. I'll let you know how it turns out.

 

Be very careful. I had same problem on my 1997C5 a couple years ago & dealer said I needed a $950.00 repair, a mass blower module or some such nonsense. Forum member who was C5 tech steered me to correct part which was $120.00 dollars. Problem is, the expensive fix won't correct problem with continuous blower running. In any event, if dealer says you need 900+ fix,email me back at dkeshel.aol.com and I will go through my old papers to get you correct part number etc. This is exact same problem I had. Rogue74

 

This problem happened to me about two weeks ago. Went in for service and found out there is a TSB #83-11-10 (-01/27/98) for this problem. I also have a 97 but have GMPP so it is warranty work. Part # they put in is 9356081. If you have a good dealer he might be able to help in that this is known problem. Good Luck

 

Ad2,

Here's a couple other threads to help you out in case you need more info:
http://forums.corvetteforum.com/zerothread?id=337588
http://forums.corvetteforum.com/zerothread?id=320529

Had a similar problem in my '97. I had a bear of a time getting the old blower motor control module out. Good luck.

Mark

 

My A/C blower motor gave up the ghost a couple days ago. In at the dealership right now. They quoted me around $210.00 parts and labor.