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Electrical harness

 
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SuperImpala00
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PostPosted: Mon Dec 31, 2012 8:47 pm    Post subject:  Electrical harness Reply with quote

So In my attempts to resolve an electrical gremlin, I found a plug coming from the left side of the engine harness which holds the connectors going to the O2 sensor, alternator and ignition module. Anybody have a clue to what it is? I can't seem to find anywhere for it to go. I'll try to post a pic when I get a chance.
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98ss
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PostPosted: Mon Dec 31, 2012 8:52 pm    Post subject:   Reply with quote

It doesn't apply unless you have a california car.
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SuperImpala00
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PostPosted: Mon Dec 31, 2012 9:04 pm    Post subject:   Reply with quote

98ss wrote:
It doesn't apply unless you have a california car.


haha thanks 98ss, just as I posted I looked down in the schematics for my factory manual and saw the california car only plug, pharkin extra cali crap. Well since I'm on here anybody good with electrical components give me a little advice? For the last month I've had an issue where the 'pala turns over really slow but catches and fires right up no problem. Battery reads 12.55v at rest and alternator checks out when running and under load. Brought it to Autozone where the "grease monkey" used his little machine and it spat out that I need a new battery but my apprehension with that is I just replaced the battery six months ago with a stock replacement AC Delco one. Another weird thing, after running awhile, I let it sit than start it, no problem not even hesitation. Thoughts?
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98ss
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PostPosted: Tue Jan 01, 2013 3:19 am    Post subject:   Reply with quote

It is possible that the battery is bad. Wouldn't be the first time that a new part is bad, but usually they have to charge the battery for an hour then test it.
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9C3
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PostPosted: Tue Jan 01, 2013 11:14 am    Post subject:   Reply with quote

A battery at rest should read 12.75 volts. GARY

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2008BlueImpalaLTZ
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PostPosted: Tue Jan 01, 2013 4:34 pm    Post subject:   Reply with quote

SuperImpala00 wrote:
98ss wrote:
It doesn't apply unless you have a california car.


haha thanks 98ss, just as I posted I looked down in the schematics for my factory manual and saw the california car only plug, pharkin extra cali crap. Well since I'm on here anybody good with electrical components give me a little advice? For the last month I've had an issue where the 'pala turns over really slow but catches and fires right up no problem. Battery reads 12.55v at rest and alternator checks out when running and under load. Brought it to Autozone where the "grease monkey" used his little machine and it spat out that I need a new battery but my apprehension with that is I just replaced the battery six months ago with a stock replacement AC Delco one. Another weird thing, after running awhile, I let it sit than start it, no problem not even hesitation. Thoughts?


If the battery tests bad - you should replace it. All AC Delco batterys have a no-cost replacement policy (for a defective unit) that is longer than six months.

I would suggest you remove and clean the battery terminal connectors with a cleaner brush. Don't assume that the inside of the clamps are "good" just by looking at them. Follow the ground cable and ensure that its connection to the body is clean and tight.

A slow crank usually means a marginal battery and/or dirty terminal post clamps (which oxydize and don't always look "dirty"), or a defective ground.

Good luck.
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SuperImpala00
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PostPosted: Wed Jan 02, 2013 9:20 am    Post subject:   Reply with quote

Thanks for the input guys, I'm gonna spend some time cleaning the cables as well as the ground. It looked pretty caked with crap. Hope that plus a replacement battery will do the trick.
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SuperImpala00
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PostPosted: Thu Jan 03, 2013 7:58 pm    Post subject:   Reply with quote

**Update** well I had the battery charged than tested and it checked out fine, so now I'm left with cleaning the grounds and cables, any tips on grounds that are culprits for our particular Impala's?
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SuperImpala00
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PostPosted: Sat Feb 23, 2013 9:25 pm    Post subject:   Reply with quote

Thought I'd update again, after finding my positive wire to be too corroded to "fix", I replaced it. All was well for a week and now I'm getting very peculiar issues. After sitting overnight, it is a beotch to start in the morning as it turns over so slowly I'm surprised when it catches and fires right up. After that initial morning problem, let it run a few minutes, shut off and it starts right up, no issues at all. In addition to that, my digital odometer is dimmer than I can remember it being in the daylight. So I'm left thinking my dash is causing a parasitic drain and needs replacement or the dreaded BCM issue is finally hitting me. Any ideas guys?
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SuperImpala00
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PostPosted: Wed Apr 10, 2013 8:03 pm    Post subject:   Reply with quote

**UPDATE** Well I can say for sure I FOUND my issues. Part of it was a corroded positive cable but after having continued issues I did a test for parasitic draw and lo and behold it was! Now, I need you guy's advice. Pulling the fuse for the stock radio cut me one full Amp off what the draw was, am I looking at a harness issue here or is the radio junk? The other fuse was in the left instrument block for the BCM/Cluster. Am I looking at replacing the Cluster or is this a harness problem? Any help would be greatly appreciated guys, thanks.
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IffyG
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PostPosted: Wed Apr 10, 2013 8:19 pm    Post subject:   Reply with quote

What happens if you pull the BCM fuse? It's possible that the car isn't fully powering down (as was the case when my BCM was cooked).

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SuperImpala00
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PostPosted: Wed Apr 10, 2013 8:27 pm    Post subject:   Reply with quote

IffyG wrote:
What happens if you pull the BCM fuse? It's possible that the car isn't fully powering down (as was the case when my BCM was cooked).


Haha, was the first fuse I pulled. Didn't do a thing so I'm confident in ruling the BCM out as the culprit.
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SuperImpala00
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PostPosted: Sun May 26, 2013 5:55 pm    Post subject:   Reply with quote

*Update* so it turned out to be the radio and cluster, got those fixed but had an incident today that scared the crap outta me. When using an inspection mirror to look at something near the starter, I happened to hit the bolt where the battery connects to the starter and it sparked like crazy. Car was off and just sitting, I'm thinking a loose connection, any ideas guys?
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05imp
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PostPosted: Sun May 26, 2013 7:50 pm    Post subject:   Reply with quote

Normal the batt cable is always hot when connected to the batt.
And it will spark when grounded


Last edited by 05imp on Sun May 26, 2013 7:54 pm; edited 1 time in total
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SuperImpala00
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PostPosted: Sun May 26, 2013 7:53 pm    Post subject:   Reply with quote

05imp wrote:
Normal the batt cable is always hot when connected to the batt.


interesting, I don't usually play around with electrical issues too much so when that happened it scared the crap outta me. Course, I'm a hypochondriac when it comes to cars Laughing
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