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Pontiac Bonneville Electrical Problems

117 messages,  Last post on Nov 30, 2009 at 5:17 AM

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#108 of 117 1995 Bonneville fuel pump and window issues by cpbowl300 Sep 20, 2009 (7:10 am)
My 1995 Bonneville will run for awhile anywhere from 10 min, to an hour and if i try and lower a window it will die, If I let it sit for an hour or so, it will restart and run fine for awhile then die again, when it does this the engine will crank over (not start) the windows will not go down and when I try to lower a window the interior light will go off. I have tested the fuel pump, I can hot wire the pump and the engine will run but the windows will not go down. the amps at the fuel pump when it is running is between 7-8 amps. Any ideas would be great Thanks Replies to this message: imidazol97 (Sep 20, 2009 7:28 am) cpbowl300 (Sep 21, 2009 4:13 pm)
#109 of 117 Re: 1995 Bonneville fuel pump and window issues [cpbowl300] by imidazol97 Sep 20, 2009 (7:28 am)
Replying to: cpbowl300 (Sep 20, 2009 7:10 am) Take the positive cables off at the battery and look between the multiple cables for corrosion. If yours is like the later ones, there's a lead spacer between the top and bottom cable, it may be corroded or squashed and affecting your contact. You should check the connections for positive cables where they go to alternator and other sources like the MaxiFuses in the Relay Center on the firewall.   You might have a battery problem with a post cracked or low output. Has it been out of the car for a check at a store like Advance Auto where they will run a check and charge on the battery?   The car has a buss for the grounds in the door sill about where you lift your heel over the door bottom. Pull away the carpet and plastic and check the condition of those grounds connecting into that buss. The buss is wrapped with electrical tape along the bundle of wires.   I would suspect a supply side problem more than a ground, but whenever funny things happen start checking grounds. Replies to this message: cpbowl300 (Sep 21, 2009 4:13 pm)
#110 of 117 Re: 1995 Bonneville fuel pump and window issues [imidazol97] by cpbowl300 Sep 21, 2009 (4:13 pm)
Replying to: imidazol97 (Sep 20, 2009 7:28 am) Thanks for the information, I will install new positive cable ends and check the ground and get back to you. Thanks again..
#111 of 117 94 Bonne by jmose Sep 21, 2009 (4:53 pm)
thanks for all the help imidazol97 & likeabigdog , my 94 bonne starts and runs great. I replaced the pcm and made a diode pack to trick the vats system. The pcm was still under warranty the diode pack cost less than five dollars, my actron cp9145 was just over 100.00 I would say it has already paid for it's self. thanks again. jmose
#112 of 117 Re: 94 bonne [jmose] by landpilot51 Sep 27, 2009 (8:56 pm)
Replying to: jmose (Aug 23, 2009 6:20 pm) Mine ran a little longer but would die in traffic or after idling a long time. Turned out to be the smaller positive battery cable that runs to the top center of the firewall. The new cable was around $45 bucks from GM and worth every penny. Replies to this message: imidazol97 (Sep 28, 2009 3:57 am) landpilot51 (Sep 28, 2009 7:12 am) imidazol97 (Sep 28, 2009 9:02 am)
#113 of 117 Re: 94 bonne [landpilot51] by imidazol97 Sep 28, 2009 (3:57 am)
Replying to: landpilot51 (Sep 27, 2009 8:56 pm) What went wrong with the cable? Replies to this message: landpilot51 (Sep 28, 2009 7:12 am) imidazol97 (Sep 28, 2009 9:02 am)
#114 of 117 Re: 94 bonne [imidazol97] by landpilot51 Sep 28, 2009 (7:12 am)
Replying to: imidazol97 (Sep 28, 2009 3:57 am) There's a design flaw in the way it connects to the other cable. I've seen several bonneville's that had this problem. I initially replaced the end on the cable but in the end replacing it resolved my problems. It's been a pretty good car and only has 53k miles. Not bad for a 10 year old, huh? Replies to this message: imidazol97 (Sep 28, 2009 9:02 am)
#115 of 117 Re: 94 bonne [landpilot51] by imidazol97 Sep 28, 2009 (9:02 am)
Replying to: landpilot51 (Sep 28, 2009 7:12 am) Is it the top cable with the lead spacer in between? The lead spacer squashes and or corrosion occurs on that end of the cable? Was the copper portion of the cable okay?
#116 of 117 Re: DIC flicker/AC comes on [imidazol97] by yep95821 Nov 30, 2009 (12:04 am)
Replying to: imidazol97 (May 23, 2007 4:56 am) Hello,   Haven't had a chance to dig through all of the posts here yet, but have read several pages worth.   I just bought a 2002 Pontiac Bonneville about 5 days ago. Everything is great, except a couple minor things. The DIC is displaying the current fuel range (ie. 223 miles etc.). None of the buttons appear to do or change anything on the DIC (Mode, E/M, Reset, and on or two other buttons that I cant remember right now).   Also, the left power mirror works fine, but the passenger side doesn't.   After reading some of these posts, it appears that I will be checking my grounds and fuses first, tomorrow, and go from there. If anyone has any other ideas or suggestions, I would be appreciative.   I will check grounds / fuses tomorrow and post results. Replies to this message: imidazol97 (Nov 30, 2009 5:17 am)
#117 of 117 Re: DIC flicker/AC comes on [yep95821] by imidazol97 Nov 30, 2009 (5:17 am)
Replying to: yep95821 (Nov 30, 2009 12:04 am) The mode button should change between things like engine temp, oil life, voltage, and a few others. Oil life can be changed using the reset button when new oil is put in. Other things can't be changed with the reset button.   Do it change mode when pushing the mode button? Does it change between mpg, instant mpg, and miles left on fuel when pushing the mileage button? Does it change between English and metric when pushing the E/M button?   If none of these cause change, I'd look at the connections for the modules on the instrument cluster. You might try a little vibration on the area of the dash with the DIC readout to see if it will make better contact. I've read some problems with corrosion on contacts in the instrument cluster area on forums.   As for the mirror, is there a switch that connects the left mirror, then neither, then the right mirror to allow changing the direction of the mirror with the little buttons that move the motors?   Do you have an owner's glovebox manual that shows that type of thing? You might search online for owner's manual. Some of those have been scanned and put online for certain years. Yours would be similar to 2000-2005 (or was 2004 last year?)

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