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Old 03-09-2020, 08:01 AM
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SOLSAKS SOLSAKS is offline
350 Buick
 
Join Date: Jul 25, 2016
Location: Benson. NC
Posts: 1,052
use or disconnect AMP meter

1976 j10
auto 360

new NOS gauge cluster
original set up as far as OEM Fuse block, etc

I read somewhere not to use the AMP meter
if using a modern alternator

not real sure if my alternator is considered modern

I am not very mechanically inclined, so to make sure I will have to ask.

but what is the general opinion, as to un hook the AMP meter
( is it a real threat of fire , etc ? )

we already wiped a cam and had to rebuild the motor again
so I don't want to ad fire to the list.

any help appreciated.

dae in NC
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1976 J-10 HONCHO Fleetside
1982 J-10 Fleetside
1988 grand wagoneer
2004 RUBICON jeep
Benson, NC
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Old 03-09-2020, 10:48 AM
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tgreese tgreese is offline
 
Join Date: May 29, 2003
Location: Medford MA USA
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There is a sticky thread above on ammeter bypass. It's been done to death.

"Modern" implies much higher amp rating than the original alternator. The ammeter likely cannot handle that.

The best solution is to replace the ammeter with a voltmeter.
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Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
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  #3  
Old 03-09-2020, 11:15 AM
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babywag babywag is offline
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Main issue with AMP meter is crappy old wiring/connections AND the age of gauge itself.
I have seen many many melted wires on these, and gauge plastic bits cracked/failing.

If NOS probably ok *IF* wiring is good.
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Old 03-09-2020, 01:34 PM
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SOLSAKS SOLSAKS is offline
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Location: Benson. NC
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10-4 thanx for the help.
dave in NC
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1976 J-10 HONCHO Fleetside
1982 J-10 Fleetside
1988 grand wagoneer
2004 RUBICON jeep
Benson, NC
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  #5  
Old 03-13-2020, 09:31 AM
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nograin nograin is offline
304 AMC
 
Join Date: Dec 19, 2000
Location: Philadelphia, Pa., USA
Posts: 2,066
Ya. Agree with Babywag. It's probably fine but definately check it out first.
Since you have the gage out you can look at it and see.

It's just a big metal plate with a stud pressed in each end.
Problem occur if the studs get loose from the plate, or the insulation fails.

Generally this is due to overheating but I'm sure there are other conditions that could also cause deteriations over time.

The later ammeters are 60 amp to 60 amp. Not sure what your year has. Might be 60 might be 40.
Any time you see close to 60 amps through the meter, there is a problem.

If you see even 30 amps going through the meter beyond for the first 15 - 30 seconds of recharging, need to ask why.
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Old 03-13-2020, 09:40 AM
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nograin nograin is offline
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My suggestions is if its in good shape, keep it, its useful.
And between bad info posted and so-so wiring work and materials many people get themselves in trouble when making a bypass.
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