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Alternator issues

1537 Views 25 Replies 6 Participants Last post by  JMJNet, 
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I ordered a new alternator for my 97 2 door Tahoe and it was different than the one I took out. A previous owner changed the plug and put a 200 amp alternator in. I also have a 94 2door diesel Blazer. The alternator in it matches the new one I bought. Also the alternator in the 94 is on the opposite side of the motor. Is this right? Are the serpentine belts different between a 94 and 97?
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G
Look for this connector where I described in the previous post.
Usually under the coolant crossover.
If there it should have BRN & WHT wires.
Trace the 4 wire harness in your photos and find where it goes.
No telling what has been done.

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I cannot believe I found the connector you are talking about. I started pulling on harnesses and it was tucked down under the AC unit not plugged into anything. Brown and white wires. The 4 wire harness in my picture goes back to the firewall and across the firewall to the driver's side and then down behind the fuse box. From there, I am not sure. So I can splice my CS 130D at this connector and my Alternator should work. You are the man.
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G
You need to find the ends of the 4 wires to determine what the PO was doing.
Then they need to be removed and any other changes corrected.
DO NOT HOOK UP THE ALTERNATOR BEFORE DOING THAT.
You could damage your new alternator, damage the gauge cluster,
have a harness melt down and even a fire.
The 2 wires on the OEM conn. you found go straight to the gauge cluster
with no splices or other connectors.
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It was some kind of service vehicle. It has a backup bell and may have had some equipment wired in. That may be why the old alternator was such a high amp one.
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Here is where the wires go.
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JMJNet
Those are hard to troublshoot since it is not stock setup.
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