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Old 09-04-2006, 06:41 PM
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Another Alternator Question..

Ok guys..I have been stumped on this one...I have put a 350 with TPI in My Old CJ. So Far everything has went smooth except this Voltage scenario.

I have bought a GM like 100 amp alternator on Ebay as a 1 wire setup but it does have a plug cap with the two prongs on it for a 3 wire setup(I am assuming it will work as a 3 wire too)

I have charged my battery, have my alternator (one wire, 14 gauge) hooked straight to the battery.

My voltmeter gauge read 12 V, when I turn the electric fan on it goes down to 10.5 or so. I have revved the engine to excite the alt. and the volt gauge reads 10.5 -12v.

My Belts are tight, It is a internally regulated alternator...I have no Alt. Light in the Jeep..

Where do I go from here...I have now boug ht a voltmeter(this sounds stupid), But am I checking the DC side right?

By the way, I am horrible any electrical projects!

My only accessories are an Electric Fan, Stereo, and TPI computer...

Any help would be appreciated.

Ben
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Old 09-04-2006, 11:43 PM
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Doc here,

First, the 14 gauge wire is underrated for the circuit..replace it with a 10 gauge wire via a proper fuse link at the starter solenoid..That should bring up the charge a bit..

Also Assumiing you have a properly bonede ground buss system..If not:

Run a properly gauged Ground cable from the battery to any handy bolt at or near the starter, From that same bolt get a Battery cable at the parts store, that has two 3/8 ring terminals on each end and attach it there and to the Frame.

Next get some 10 gauge wire and ring terminals and run that from your bolt on the block to the Firewall, and another to the Alternator bracket or mount bolt.

Next get some Wire Braid, (Radio Shack or others) and install braid from the radiator support to the frame, Fenderwells to frame , hood to firewall, Doors to door posts, gas flap to body, tailgate / Trunk to body.

At each point the wire is grounded, Burnish ALL the paint and grease off to bare metal. Use a proper star-washer and lock. Use sheetmetal or Tech screws where no screws are available.

It sounds like a lot of work, but after you assemble all the parts, it's only a few hours to do..and you'll end up with a system that will work reliably for many years to come..and can eliminate that from your troubleshooting list.

If not, post back and I got some other ideas to try..

Doc
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Old 09-12-2006, 01:10 PM
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Fixed it..

Thanks DOC..It was the grounding that was my problem. Works like a Charm now.

Now I just have to get her to purr a bit better....

Thanks again,

Ben
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Old 09-12-2006, 02:48 PM
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Doc here,

KEWL!!

Simple is good!

Thanks for posting back the fix..It will help other's also!

Doc
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