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Pontiac Bonneville Heating/Cooling Problems

149 messages,  Last post on Dec 06, 2009 at 8:16 PM

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What is this discussion about? Pontiac Bonneville, Heating / Cooling, Sedan

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#141 of 149 Re: hvac doesnt work at all [imidazol97] by cmazeo Oct 02, 2009 (11:24 am)
Replying to: imidazol97 (Oct 02, 2009 8:53 am) #33 and # 34 checked out good, #25 has no power feeding the fuse at all. Thanks ..............also I pulled the unit out and checked the connector in the back where it slides in for power using a grounded probe light and I had pwr on about 4 of the leads on that connector. That unit is hvac unit is really flimsy.. I think I'll try and find one at the salvage yard and replace it .. maybe that's the problem. will let you know ... thanks Replies to this message: imidazol97 (Oct 02, 2009 12:49 pm) cmazeo (Oct 02, 2009 9:52 pm) cmazeo (Oct 04, 2009 1:08 pm) imidazol97 (Oct 04, 2009 6:44 pm) and 1 more...
#142 of 149 Re: hvac doesnt work at all [cmazeo] by imidazol97 Oct 02, 2009 (12:49 pm)
Replying to: cmazeo (Oct 02, 2009 11:24 am) You might want to check ebay and other used books for a Helm factory service manual for your Bonneville. Helm does the authorized manuals. Helminc.com has them available new. It sounds like you might get your use out of it troubleshooting.   You said your car was the automatic temperature control... because you said you couldn't see the readout. I didn't check the manual unit.   Odd the passenger door module wouldn't have power. Do the windows and power locks work on that door? Replies to this message: cmazeo (Oct 02, 2009 9:52 pm) cmazeo (Oct 04, 2009 1:08 pm) imidazol97 (Oct 04, 2009 6:44 pm) cmazeo (Oct 05, 2009 3:59 pm)
#143 of 149 Re: hvac doesnt work at all [imidazol97] by cmazeo Oct 02, 2009 (9:52 pm)
Replying to: imidazol97 (Oct 02, 2009 12:49 pm) No, the power lock or window doesnt work. The window was stuck in the down position and I ended up powering up the motor in order to get it to go up. Will be checking on that service manual though.. thanks.
#144 of 149 Re: hvac doesnt work at all [imidazol97] by cmazeo Oct 04, 2009 (1:08 pm)
Replying to: imidazol97 (Oct 02, 2009 12:49 pm) Ok I screwed up. I thought I was using the ground post checking for battery on the fuses but actually I was using a positive post near the fuse panel. I rechecked the fuses the correct way with the car running and not running. Fuse # 33 and # 30 had no power car running or not. I traced # 33 and found the wire (brown) was spliced into 2 other brown leads. I tied a hot lead to the other brown leads and started the car. The hvac unit works fine. The blower motor has a loud hum and weak air flow but at least I am getting close to fixing the problem. Thanks !!!! again for your help... Checked on ebay for manual... I'll be buying one from there. Thanks again. Replies to this message: imidazol97 (Oct 04, 2009 6:44 pm) cmazeo (Oct 05, 2009 3:59 pm)
#145 of 149 Re: hvac doesnt work at all [cmazeo] by imidazol97 Oct 04, 2009 (6:44 pm)
Replying to: cmazeo (Oct 04, 2009 1:08 pm) >Ok I screwed up. Welcome to the club. At least you didn't "break" anything being backwards. I tend to break things that weren't already a problem.   This is what the factory service manual looks like and it is two manuals. This one is the Helm manhal.   try searching for combinations of factory, service, bonneville, pontiac, and see if you come up with some that aren't completely labeled.   Helm manual for GM   Try searching for combinations of factory, service, bonneville, pontiac, and see if you come up with some that aren't completely labeled.   here's one under 2000 bonneville service manual (no word factory) and it's $5 current bid 20 hours to go and $15 shipping.   link title   here's one for $9.99 and 9.99 shipping bid current. link title   Make sure both manuals are there.   I didn't look under Pontaic without the bonneville word...   As for the circuits, I think studying the manuals will help.   Check the cabin air filter intake for the blower motor. If there's a filter it may be stopped up. See if the blades for the fan rotate freely while you have the filter out (you can easily see the blades when you're servicing the cabin filter out on the firewall. Replies to this message: cmazeo (Oct 05, 2009 3:59 pm)
#146 of 149 Re: hvac doesnt work at all [imidazol97] by cmazeo Oct 05, 2009 (3:59 pm)
Replying to: imidazol97 (Oct 04, 2009 6:44 pm) I ordered a set of service manuals from ebay today.... cost about $ 27 with shipping. Should be here in a few days. Thanks again for the help. Will let you know how everything turns out. There are a few things wrong with the car .. so this should help.
#147 of 149 Re: a/c or heat blower vent changes on acceleration [imidazol97] by rockoh Oct 11, 2009 (8:05 am)
Replying to: imidazol97 (Sep 21, 2009 1:23 pm) Ralph,   Man, you gave me the whole breakdown. Thanks dude, and I will let you know how it works out. I have been kind of busy so I just got a chance to look at the website again, but I am glad I did. I'll get back to you after my investigation.   Rockoh
#148 of 149 Proublems with heat and cooling system on a 1997 Bonneville - it heat by shannion7577 Oct 15, 2009 (1:40 pm)
I own a 1997 Bonneville - it heats the inside at start up - couple of minutes later - it turns on the air - two mechanics are left shaking their head - while saying I have never seen it do this before, have you - what was the cause?
#149 of 149 Heating Control Not Working Correctly. by popsydoodle Dec 06, 2009 (8:16 pm)
I own a 1997 Bonneville. My heating does not work correctly since I had a total loss of power. I had removed the battery to charge it then put it back in. Since this happened I had a technician test the battery and charging system, both tested okay. He said the loss of power was caused by a badly corrodid battery terminal which he replaced. The control is temp controlled and when I set it for heat it just blows cold air. Some times shutting the vehicle off and restarting it corrects the problem. The other thing I have noticed is the Temp indicator flashes 2 to 3 minutes then stays on solid, this happens every time the car is started. Is there something that needs reset to correct this problem or is this an indication of some kind of component failure? The technician could not find anything about the flashing temp indicator and suggested I take the vehicle to a dealer for service.

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