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Weird alt prob/ won't kill now |
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kellysguy 
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Joined: Mar/15/2012 Location: Mississippi Status: Offline Points: 745 |
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 Topic: Weird alt prob/ won't kill nowPosted: Apr/14/2012 at 10:19pm |
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P.O put a GM internal reg alt on (7127-3 for you parts guys)
No adjustestment, it came with a worn out belt. I jumped a proper sized belt one. It has proper tanesion and everything has been working good. All gauges and lights have been disconnected. I've been hooking everything back up. Nothing out of the ordinary, just testing wires and hooking them back up where they belong. The alt charge wire had been spliced. While I was hooking up the oil sender the charge wire pulled out the butt connector. I shoved it back in planning to fix it correctly later. I cranked the car up and rev'ed it. The belt started making noise. I went out under the hood and held it at ~2500 RPM. The belt didn't make noise but started to smoke. I unplugged the charge wire and it stopped/ PLug it back in and it does it again. Nothing has really changed other than hooking things back up and the wire no properly crimped. I wonder if the crimp has so much resistance it overloads the alt? Any ideas? Anyone else convert to the early GM internal reg alt? If so, how is it suppoed to be wired up? Thanks. This may explain why the other belt was shot.
Edited by kellysguy - Apr/15/2012 at 7:17pm |
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steeters
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Joined: Feb/02/2008 Location: California Status: Offline Points: 913 |
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Posted: Apr/14/2012 at 11:13pm |
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Is the new alternator the same "dimensions" as the old one? Pulleys and everything properly lined up?
Steve
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Steve Teeters - 1970 Javelin SST 390 Ram Air (401/727)- For Sale $10,000
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steeters
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Posted: Apr/14/2012 at 11:15pm |
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Maybe you've already got this covered, but there are "GM" alternator brackets that come off some of the later model AMC vehicles that are often necessary when you swap to GM style alternators.
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Steve Teeters - 1970 Javelin SST 390 Ram Air (401/727)- For Sale $10,000
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kellysguy
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Joined: Mar/15/2012 Location: Mississippi Status: Offline Points: 745 |
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Posted: Apr/15/2012 at 5:35am |
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Everything lines up and was working fine before I started hooking the gauges back up. Yeah, I saw in a search about the brackets. I'll do that as soon as I can find some. I need to know about how the wiring is supposed to be when converting.
The only thing I can think of is I fried something while trying to find the right wire for the temp gauge. There were a couple of wires comming down the passenger side I thought might be the temp wire. I temporarily grounded them w/ the key on (yeah, I know) to test and see. My leads weren't long enough to do a continuity test, thus the short cut. I figured worse thing I could do was blow a fuse. I now realize these may be wires that were used for the old alt and reg. I still have a factory style reg hooked up. One thing I see about the conversion wiring is the pigtail for the reg in the alt is jumped out b/t the terminals. On side of the pigtail is a short wire w/ a ring terminal. It would appear that this ring terminal should go to the "one wire" on the alt. It's the right lenth, however; this wire isn't hooked up. It has to be something I did as it worked great before. I have been listening to the radio while working on the car. I thought maybe I ran the bat down enough to warrant a good recharge from the alt. The thing is, the belt is tight. It's acting almost like the alt is trying to lock up or has too much resistance. You can see the belt sink down in the pulleys when you rev. I don't know what to think. Hey Bill, have any ideas?
Edited by kellysguy - Apr/15/2012 at 6:13am |
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FuzzFace2
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Posted: Apr/15/2012 at 12:40pm |
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Ok for any wiring and for the ALT you will need a TSM, If you dont have one get one it will help a lot.
Have you seen this post http://theamcforum.com/forum/wiring-a-gm-10si-or-27-si-into-amc_topic12493.html it should help you get that ALT wired up.
The PO of my street Javelin installed a GM ALT and a mess of the wiring on that side and nothing for the dash worked. To get the adjustment needed I took 2 stock brackets, cut and welded to give me more adjustment.
Stock bracket
Mod bracket
Mod bracket in place
Messed up wiring, note no stock REG used with the GM ALT
I have since fixed all the wiring & dash gauges / lights and with testing only all looks to work as it should.
Dave ----
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75 GremlinX v8
76 GremlinX i6 (sons) 70 Javelin SST 390/4sp (360/5sp now) 70 Javelin 1/4 Drag car 360/auto |
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FuzzFace2
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Posted: Apr/15/2012 at 12:49pm |
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Oh and why the smoking belt? If you were to check the out put of the ALT when it is smoking the belt bet you will see it over 16+ volts and because the batt volts would be low from testing and starting the motor the ALT will try to juice it back up. It could be you dont have it wired right too. Also know the sensing wire needs to be hooked to the BATT. or better yet to the main feed wire to the inside of the car. If that wire is hooked to the ALT out put it will not read right and could end up with dead BATT. If on out put the REG sees the ALT is putting out what it should and never sees the BATT needs the juice and never gets charged.
Dave ----
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75 GremlinX v8
76 GremlinX i6 (sons) 70 Javelin SST 390/4sp (360/5sp now) 70 Javelin 1/4 Drag car 360/auto |
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carnuck
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Posted: Apr/15/2012 at 2:12pm |
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High output alt with a single belt will chew them up pretty quick.
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kellysguy
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Posted: Apr/15/2012 at 2:29pm |
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Thanks, didn't see that thread before. I looked but couldn't find it.
Just what I needed.
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kellysguy
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Posted: Apr/15/2012 at 5:01pm |
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Use both the orange and the orange with the tracer or just the orange wire by itself? can I just stick a bullet terminal in the wiring harness where the orange wore connected to?He shoes before but not before and after.
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kellysguy
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Posted: Apr/15/2012 at 5:12pm |
It's the 63 amp GM internally (A1 Cardone 7127-3) regulated alt they used on everything from 73 to 87. GM only used one belt too. I've seen completely drained bats charged up by alt only with one belt with no problem. I've never seen one do this unless the bearings were going bad.
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carnuck wrote: