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Join Date: Nov 2012
Posts: 6

IGN Fuse Blowing

11/05/2012 4:31 PM

Im sorry to be a bother but I need some advice about this problem. I have owned a 2000 2.2 liter cavalier for about 5 years now with no electrical problems. About three weeks ago the car just dies in the middle of the road,after inspecting the inside fuse box I noticed the ign mod fuse was blown. So put another fuse in it and it started up and ran for three weeks then the same thing happened again. I bought a new fuse put it in and now its running fine again. I looked for shorts and could find none, even messed with all the starter wires and battery wires while the car was running and still no problems. I have noticed the fuse only blows once the car has been running for a while and once it blows it will do it every 8 to ten miles. If I let the car cool down over night I will be able to drive 30 mins or so before the fuse blows again. The fuse never blows when I start the car tho. I has the ignition module tested and it came back bad so i replaced it and the, Ignition coils, spark plugs, spark Plug wires, and ignition switch. I also has the battery, starter, and alternator checked and they had no problems. After I replaced all this stuff the car lasted a whopping day in a half and the fuse blew again. So I took the Ignition module off again had it tested and it was fried again. I have checked every wire on this car inside and out and can find no shorts, bare wires or bad grounds. I have been working on this car for weeks now and and have put almost 300 dollars in it. This is my last alternative before I take the gallon of gas and match option. Sorry for the length of this question. Thanks in advance

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#1

Re: IGN Fuse Blowing

11/05/2012 8:34 PM

Go here: http://chevroletforum.com/forum/

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#2
In reply to #1

Re: IGN Fuse Blowing

11/05/2012 10:41 PM
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#3

Re: IGN Fuse Blowing

11/05/2012 11:59 PM

Plan B sounds more and more promising....

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#4

Re: IGN Fuse Blowing

11/06/2012 8:04 AM

From an analysis viewpoint it is important to know whether the fuse is blowing because of an overload or a short circuit. For this reason, I suggest you monitor the current in that circuit. If there is an intermittent short circuit you will have to locate and repair it to solve your problem. If the fuse is being overloaded, you may want to try using the next higher current rated fuse and see what happens (e,g. if a 10 amp fuse is blowing due to an overload, try a 15 amp fuse). This procedure raises some safety concerns, but so does a car failing to operate.

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#5

Re: IGN Fuse Blowing

11/06/2012 9:30 AM

It is symptomatic of intermittent, high supply voltage delivered to IGN circuit. You may dig around, AVR circuit & associated wiring.

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#6

Re: IGN Fuse Blowing

11/06/2012 7:38 PM

Try replacing your earthing from the ignition module to chassis and check/replace the earthing between chassis and engine. If either of these is damaged/missing you could be getting overvoltage on the output as it tries to fire the plugs, and fry the unit.

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#7

Re: IGN Fuse Blowing

11/07/2012 9:08 AM

Hello . Reading up on the Recalls and Technical Service Bulletins is a good place to start. You can find info @ www.alldatadiy.com (not an endorsement). Example:

Title Number Date
Recalls
Recall - Ignition Circuit Thermal Events 04002 05/08/2007
Recall - Ignition Circuit Defect 04002 02/18/2004
Recall 04V036000: Ignition Switch Fire Hazard NHTSA04V036000 01/27/2004
Recall 00V201000: Instrument Panel Lamp Intensity NHTSA00V201000 07/20/2000

Technical Service Bulletins
Engine Controls - Aftermarket Accessory Usage 04-06-04-054D 02/28/2012
Electrical - Information For Electrical Ground Repair 10-08-45-001C 06/06/2011
Electrical - MIL ON/DTC's Set By Various Control Modules 09-06-03-004D 12/08/2010
Electrical - Aftermarket Fuse Warning 07-08-45-002 09/05/2007
Electrical - Instrument Panel And General Wiring Repair 06-08-45-004 05/02/2006

Electrical - Harness Connection Inspection 03-06-04-012A 08/10/2005

Hope this helps.

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#8
In reply to #7

Re: IGN Fuse Blowing

11/12/2012 7:45 AM

Thanks I already found the problem. It ended up being the hot wire coming off the Ignition module. It was a really small bare spot, and was shorting out on the metal cover plate towards the back of the engine. Thanks anyways

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