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1995 Chevrolet Caprice Question: Ignition just stopped

 

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RACERX_1, San Antonio, TX, April 09, 2009, 07:58
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At a light and car just shuts off. Discovered I've got no spark. Replaced distributor, coil, control module, and wires. Still no change. I noticed that a fuse is burning out so I replaced that too. Once replaced, turned over the engine, it blew again. What should I check next. Please reply before I pull all my hair out.

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  • Answer #1

    dandd April 09, 2009, 11:55
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     Master

    You need a wiring diagram to trace down all the circuits for that fuse, and then you need to check each device and circuit until you find the short or over load which is blowing the fuse. It is not easy but this is the way you approach a fuse blowing that in some way controls how/if the engine runs. which fuse is it? Can you determine that. It should say somewhere on the panel.

    The most reliable place for a quality schematic is www.alldatadiy.com

    Good work! I would check the Ignition switch and circuits. If the PCM ( engine computer) were ruined, I doubt that the car would ever start. I have seen wires that were chafed and touching metal in the ignition circuits. Wires that even go to the distributor etc. If you can disconnect parts of the Ignition circuits, that may help. Even some of the lighting circuits can be energized by the Ignition circuits, so a broken bulb, can , in some cases, cause fuses to blow.

    The most reliable place for a quality schematic is www.alldatadiy.com You have to pay a fee for the info, but Alldata is a professional level data system ( I use it and Mitchell every day) for repairing cars. Be sure to print all or even more than you need once you pay the fee. Print out all the schematics if you can and parts location info for any thing electrical or engine power train related ( i.e. fuel njection, ignition etc )

    Good Luck, let me know how you make out.

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    RACERX_1, April 10, 2009, 10:04
     Rookie

    Thanks for your quick reply. I really would like to get this car running again.
    I Looked under the hood and found the fuse is the PCM/IGN. I'm guessing either the PCM or the ignition switch is shorting. Is that poosible??

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    RACERX_1, May 03, 2009, 11:46
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    I had a mechanic tell me it might be the ECM. To disconnect the computer and recheck the fuse. If it does not blow then it is the ECM. If it does while ECM is unplugged then keep searching. Well, I guess I will keep searching. Next obvious thing is the ignition switch. I'll keep you updated. This is driving me MAD! I'm cool, I'm cool.

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  • Answer #2

    RACERX_1 May 24, 2009, 08:33
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    Finally got a chance to change the ignition switch which I thought might do the trick. It was a no go. Where can I acquire a electrical schematic for this type of car?

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    RACERX_1, May 24, 2009, 09:06
     Rookie

    Finally got a chance to change the ignition switch which I thought might do the trick. It was a no go. Where can I acquire a electrical schematic for this type of car?

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