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#1 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Pictures of both AMP gauge fuse locations?
I shorted my amp gauge when working on my cluster and the fuse by the junction block broke when I pulled the holder apart. I replaced it but the gauge still isn't working. I have heard of a 2nd fuse but on externally regulated vehicles. I have a 70 with internally regulated alternator. Does anyone have a picture of where this 2nd fuse holder is on my model??
Thanks!
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#2 | |
The Older Generation
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Location: Montezuma, Iowa
Posts: 25,481
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Re: Pictures of both AMP gauge fuse locations?
Quote:
LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 | |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Pictures of both AMP gauge fuse locations?
Quote:
Now to figure out how to install a 1-wire alternator AND keep the gauge working.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#4 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Pictures of both AMP gauge fuse locations?
Found the one on the driver side. It was blown as well. Replaced it and the gauge works again! Stoked!
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#5 | |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Pictures of both AMP gauge fuse locations?
Quote:
You could convert the ammeter to a voltmeter, I think someone on the board even sells a kit. It'd be more informative, accurate, and best of all it'd work!
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#6 | |
Registered User
Join Date: Oct 2015
Location: Toronto
Posts: 102
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Re: Pictures of both AMP gauge fuse locations?
Quote:
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1978 SWB cheyenne A/C, power steering/brakes, 305, Tach, Gauges 1972 SWB Custom 10, gauges, cammed LQ9, M22 ![]() |
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#7 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Pictures of both AMP gauge fuse locations?
I was using the LS3 eRod wiring harness, so it gets tied to the battery, and the main lead from the alternator goes to the junction block. It has the sense wires if you can use them, so I just went ahead and used them. That means that NONE of the original wiring was retained or modified, and the old regulator is still sitting on the firewall. So my case likely doesn't help you much, sorry.
There are a ton of threads on the basic external regulator to internal conversion. It's cut two wires and loop two others together, pretty easy, if that's what you're after.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#8 |
Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,216
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Re: Pictures of both AMP gauge fuse locations?
Changing the alt. wireing will have no effect on the ammeter.
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#9 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,688
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Re: Pictures of both AMP gauge fuse locations?
I agree. The ammeter measures the current flowing one direction or the other along the red wire that goes from the battery junction block to the front driver-side fender area. As long as your alternator connects to the red wire at the driver-side fender area, and you continue to use that same 12 gauge red wire, the ammeter will work fine and show battery draw or charging.
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#10 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Mad electric is all you need.
Read this and see why 3 wires is better than one. ![]() http://www.madelectrical.com/electri...hreewire.shtml
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#11 | |
Junior Member
![]() Join Date: Nov 2018
Location: Kirkwood, PA
Posts: 98
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Re: Pictures of both AMP gauge fuse locations?
Quote:
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#12 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,521
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Re: Pictures of both AMP gauge fuse locations?
After 50 years the small glass fuse is PITA. Just partially rewired a customers truck and changed them over to a spade fuse with the internal alt. I pull the wires out of the voltage reg connector and eliminate the blue and white. Left over with red and brown. Hook a single connector to each of them then to the alt connector. Been doing it for years this way. Want to go back to OE someday? save what you take off and put it in a baggie. Easy peasy. Priced out a regulator and alternator at over 120.00. Got the updated one for 58.00 and moved a couple of wires. Had to re-clock the new alternator though so the wires weren't hanging above the ex manifold
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#13 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,688
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Re: Pictures of both AMP gauge fuse locations?
Well, I don't think glass fuse or spade fuse in the ammeter wiring would have anything to do with the temperature gauge. You have a blown fuse or disturbed some wiring or disturbed something on the instrument cluster related to the temperature gauge.
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#14 |
Senior Member
![]() Join Date: Mar 2015
Location: washington
Posts: 2,234
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Re: Pictures of both AMP gauge fuse locations?
Changing the alt. wireing will have no effect on the ammeter. "
Maybe not. However, typically installing a one wire alternator is for extra capacity. It is installed for options like electric fans or power seats. You should not be running 100A through a 12 gauge wire. The old school amp gauge is run on the "shunt principle". Both sides of the factory amp gauge have 12V. The amp gauge is, in reality, a micro volt gauge that is calibrated in amps. Because of the low voltage difference between the connections they have to be perfect. I have repaired many a amp gauge by cleaning the terminals. Starting with the connection at the small black terminal and continuing to the connections at both fuses. The system is temperamental because of this and is one of the reasons GM discontinued the shut amp gauge in favor of the voltage measurement. |
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#15 |
All stock and staying that way
![]() Join Date: Jul 2003
Location: Elkland, PA
Posts: 1,456
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The GM truck shunted ammeters may be temperamental, but sure beats the electrical systems used by Chrysler in the same period, where full power was sent through their ammeters, having the potential for much serious issues such as a dead vehicle or even worse fires.
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1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... ![]() 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... ![]() 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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#16 |
Mr. Cheyenne
![]() Join Date: Jun 2020
Location: Kyle, Texas
Posts: 1,688
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Re: Pictures of both AMP gauge fuse locations?
The other day I was searching for the correct size / name for the original fuses and came across this thread. Just in case someone was looking for (original) fuses this is what I got off Amazon. Which fit perfectly and came to me next day delivery.
Bussmann Division SFE-4 Auto
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Richard '72 Chevy C10 Cheyenne *Super WHT/MED BRONZE/WHT SBC 350 | TH350 | LWB | AC | Buddy Seats Upgrades: Tilt | Front Sway Bar | Radio | Sliding Window | Bed Spare w/Lock Bed Rails | Full LEDs | Courtesy Lights | Tachometer | Glovebox Lock & Light | Head Light Relays | *Upgraded Fully Super Trim |
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#17 |
Junior Member
![]() Join Date: Nov 2018
Location: Kirkwood, PA
Posts: 98
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Re: Pictures of both AMP gauge fuse locations?
Thank you.
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#18 |
Senior Member
![]() Join Date: Jun 2022
Location: San Ramon,CA
Posts: 501
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Re: Pictures of both AMP gauge fuse locations?
Thanks. I needed a 4A, so I tried to buy the Whitman's Sampler at O'Reilly's but it had so many sizes I'd never need that I passed
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1970 C10 Custom longbed 350/350 |
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