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Pontiac Bonneville Heating/Cooling Problems

148 messages,  Last post on Oct 15, 2009 at 1:40 PM

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

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#144 of 148 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 148 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 148 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 148 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 148 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?

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