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Old 01-23-2008, 07:03 AM   #1
DANTES JIMMY
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Join Date: Jan 2008
Location: PENDLETON,INDIANA
Posts: 271
Question Amp Gauge

Hey All Gotta Question
I Have A 72gmc Jimmy 4x4 350 Auto
And My Alternator Was Changed To A Internal Regulated By The Previous Owner Havent Found His Repair At The External Regulator
But My Amp Gauge Shows Discharge At All Times (except At Key Off)
I Read Somewhere
That The Small Wire Off Of Alternator Goes To Volt Gauge
So Does This Dude Have My Amp Gauge Reading Volts??
I Havent Gotten Too Deep Into It Yet
Thought I Would Get Some Ideas Before I Get To It
The Prev Owner Wasn't Much Of A Mechanic And Do You Really Run All Of The Currrent From The Alternator For The Whole Truck Through The Gauge??
Im Lost

No Fires Please Lol...
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Old 01-23-2008, 10:15 AM   #2
JimKshortstep4x4
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Location: Muskegon,MI,USA
Posts: 6,026
Re: Amp Gauge

The amp meter on these trucks read the flow of electricity based on wire resistance over a length of about 3 feet so only a very small amount of power goes through the gauge.

I would suggest hooking a volt meter to your battery with the engine running. Voltage should read approximately 14.5 volts if the alternator is charging.

Jim
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1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end
1965 Impala SS 400 sbc, Muncie rock crusher
1966 Impala SS 396 bbc, TH 400
1969 El Camino, 350 sbc, TH 350
1971 Snowplow built on a Blazer frame
1972 GMC Short bed, stepside, TH 400, 427 BBC
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Old 01-23-2008, 11:03 AM   #3
DANTES JIMMY
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Re: Amp Gauge

I Forgot To Add That To Original Message
At Batt I Am At 14.5-15 Volts So Im All Good There
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