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Discussion Starter #1
2006 impala new batt new alt new starter. I believe whom ever did the work shorted the fuseable link out. I have no power at the red wire on the alt while off. On jumpers I get 6v at that same spot on the alt. Could I go directly from the alt to the battery with a jumper to verify this Is the problem? Before I go chasing this under the car it would be great if I could perform this as a test. My voltmeter lead broke so I’ll have to get a new one tomorrow in the mean time I have my test light if I go to the starter and check I should have power there from the batt correct? Just not at the alt if that fused link is bad right?
 

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To check the fusible link, check continuity with your meter. Should be able to determine real quick that way whether or not it is bad or good.

Maybe someone here with schematics for the charging system for your car will chime in, all cars are not the same and I am not sure about a line straight from the alternator to the battery.
 

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Discussion Starter #3
To check the fusible link, check continuity with your meter. Should be able to determine real quick that way whether or not it is bad or good.

Maybe someone here with schematics for the charging system for your car will chime in, all cars are not the same and I am not sure about a line straight from the alternator to the battery.
That’s the plan when I replace the leads for my multi meter tomorrow. I’m charging the battery back up now in theory the power wire just makes a run from battery to stater supplying a constant to the starter then moving on to the alt. Again theoretically bypassing the starter and going from the alt to the batt is the same. As long as the wires of proper gauge and also has an inline fuse it should be the same. I see a scorch mark on the intake directly near the alt power my guess is they shorted that fuse out by not disconnecting the battery before removing the power wire from the alt. If the fuse is the cause to get the car running for now going from alt to batt would be the best way to get the car running while I order a new cable. Hoping some one agrees or can shed some knowledge on if it’s a good/bad idea
 

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Discussion Starter #4
So for those wondering. I got it charging. Instead of playing with the fuseable link or anything like that I removed the power wire from the alt heat shrink tubing around it then zip tied it out of the way. Took another length of power wire and ran directly from the batt to the alt. And this resolved the issue no more check charging system no more under charging. 14.53 volts consistent. Hope this helps in the future. Make sure you remove the original power wire from the alt if you leave it connected it will supply starting voltage to the starter it won’t engage the bendix spring but will turn the starter over.
 

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Discussion Starter #5
New update. Alt is showing 14.5 volts car runs fine but still have the service charging system message. The pigtail to the alt was chopping at some point so I bought a new pig tail harness soldered it in making sure I didn’t cross the wires. I even went and replaced the wiring from the batt to starter up to the alt and that didn’t do anything just as I assumed it wouldn’t.

Is there a way to supply a ground or power believe it works on a ground signal from the pcm if I ground the wire out have to find out if orange or green is the right one still haven’t looked yet because I wanted to see if any one knew if tricking that wire would remove th message. Any body tried or have as suggestion? Everything’s new fuses are good relays good it was off for a day after I had the batt unhooked with in 30 miles it came back.
 

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I would disconnect the battery for 1/2 hour, in that time clean both terminals good and then reconnect, make sure they're on right and snug them up good and see if that solves the problem.
 
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