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Pontiac Bonneville Electrical Problems

115 messages,  Last post on Sep 28, 2009 at 9:02 AM

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What is this discussion about? Pontiac Bonneville, Electrical, Sedan

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#109 of 115 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 115 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 115 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 115 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 115 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 115 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 115 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?

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