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Electrical problems 03 classic..

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Old 13 Jun 2013, 12:49 pm
Fresh Cruiser
Join Date: Jun 2013
Posts: 4
Exclamation Electrical problems 03 classic..

Ive been having some electrical problems for about a year now... After I drive my car non stop for about 5 miles and comes to a stop light, all the interior lights go dim and get bright again..

Repairs over the last year.....
** Changed the alternator twice
** Changed the battery 3 times ( now have a Interstate batt. )
** Switch out almost all of my stock bulbs to LEDz
** Changed headlights to HIDz ( they dont fo dim anymore like before now)


Possible solutions thats im told could work but am not sure..
** reflash my computer.
** Replace the ECM PCM all together..

I guess my main question is, is anyone else having this problem... and if so what can be the cause/solution.....
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  #2 (permalink)  
Old 13 Jun 2013, 01:59 pm
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Join Date: Nov 2010
Location: oak creek, wi
Posts: 1,149
Default Re: Electrical problems 03 classic..

to begin with, i would check the main ground wire from the battery to the block. maybe replace it with a thicker ground wire, especially if there's any hint of green corrosion near the wire ends.
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Old 13 Jun 2013, 02:48 pm
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Join Date: Sep 2001
Posts: 27,757
Default Re: Electrical problems 03 classic..

Besides the above advise (which is good) you should look through the below post on the subject of Hyper Grounding. Myself and others have tried it and those with electrical problems seem to think it helps. It's a lot of reading and it starts out by explaining the grounding wires on the front struts then goes on to talk about the Hyper Grounding (extra ground straps).

ground wires from body to front struts?
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Old 13 Jun 2013, 03:18 pm
Join Date: May 2011
Location: Dallas Texas
Posts: 3,722
Default Re: Electrical problems 03 classic..

Dang canbus
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Old 13 Jun 2013, 05:24 pm
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Join Date: Jun 2013
Posts: 4
Exclamation Re: Electrical problems 03 classic..

Thank you guys for the quick feed back.. The lines to and from my battery have all been changed out. When I first got my car 3 years ago, the green buildup was bad, it actually corroded the connector to the battery. if after grounding my car better I still have the same issues, could it be the voltage regulator in the ECM PCM??
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2003, ecm, electrical, pcm

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