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Bat/alt gauge quit working

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Old Nov 4, 2016 | 03:56 PM
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Bat/alt gauge quit working

1987 f250 460 is the truck. Im showing 14+ volts with a multimeter on the battery. The gauge has stopped working. Pulled the + battery cable off truck kept runnung and when I put it back the gauge began working but has quit again. Any ideas? What Wire feeds the gauge?
 
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Old Nov 4, 2016 | 11:26 PM
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Pulled battery cable off while running again today and presto, gauge works again. Odd. Doesn't make sense.
 
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Old Nov 5, 2016 | 12:23 PM
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Pulling a battery cable off a running modern vehicle with an alternator & computer is never a good idea.
 
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Old Nov 5, 2016 | 06:02 PM
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'87 460 is still carbureted.

I've had my gauge stuck (for years) I would rap on the cluster and it would jump loose and go to normal. -charge indicator light never came on-
It finally pi$$ed me off enough that I bought another cluster from Ebay for $35.
 
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Old Nov 5, 2016 | 07:56 PM
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My bad...

Pulling a cable off anything with a alternator while running is never a good idea.
 
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Old Nov 5, 2016 | 08:07 PM
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No doubt.

And these are the dreaded 2G alternator as well.
 
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Old Nov 5, 2016 | 09:00 PM
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I defiantly need to research the 3g how-to.
 
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Old Nov 6, 2016 | 12:18 AM
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I'm seeing a lot of 2g to 3g conversion pigtails for $15ish. Any one use these? I understand it's not the complete wiring.
 
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Old Nov 6, 2016 | 01:34 AM
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If you have a ring terminal and an insulated female spade you don't really need the regulator plug.
but it is a clean way to do the conversion and cheaper than buying a new regulator plug and A/C clutch connector which doubles as the 'S' connector.

Other than that, you need a fused charge cable, a thin washer with 15mm ID and a way to tap the adjuster ear 3/8-16
 
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Old Nov 6, 2016 | 01:06 AM
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Is the washer to shim out the vbelt pulley?
 
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Old Nov 6, 2016 | 01:08 AM
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Yes
(post is too short)
 
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Old Nov 6, 2016 | 06:30 AM
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Looks like the large case 130 amp 3g is cheaper where I work than the small case. Does it matter? Large case $123.99 vs 173.99 for small. Before my discount of course
 
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Old Nov 6, 2016 | 08:43 AM
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"large case" is 148mm diameter 130A -with two holes-
"small case" is 135mm diameter 95A -with four holes-
David posted pictures of both (side mount) just the other day.
​​​​​​​
There is also wide (8.25") mounting and narrow (7") mounting.
460s and Sixes take wide. Windsor's take narrow.
 
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Old Nov 6, 2016 | 10:35 AM
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Ok maybe the 8.25 vs 7 is what I'm seeing. They both were listed as 130amp.
 
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Old Nov 6, 2016 | 03:52 PM
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...Link...

https://www.ford-trucks.com/forums/1...f350-5-8l.html
 
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