help with gauges - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevygrl68 · 12-16-2009, 10:44 AM

i'm trying to make all of the stock gauges functional in a 68 shortbed pickup.. but i'm new at this stuff and i'm not exactly sure how to hook them up! oil pressure and speedometer i've done... need help on the rest!

Thealien · 12-16-2009, 10:53 AM

Welcome. On mine the AMP gauge wasn't working because a couple of small fuses were blown on the radiator support (little black rubber fittings in the middle of the wire). This is on a 72 not sure if yours is the same. Is your gas gauge working?

chevygrl68 · 12-16-2009, 09:09 PM

no fuel gauge is not working. i don't know which wire or wires need to be hooked up to it.

Thealien · 12-16-2009, 09:12 PM

Sorry I tried to link to the FAQ thread with the wiring diagrams but the pictures are gone

I tried to upload the pictures to photobucket but they are in the wrong format.

I tried to upload the pics directly but the files are too large!! If I resize them they may not be readable!!

chevy88 · 12-16-2009, 09:15 PM

Where are the wires unhooked at the gauge or fuel sender on tank?

chevygrl68 · 12-16-2009, 09:27 PM

wires are unhooked from the gauge. i replaced the entire gauge cluster - i hooked up the speedometer and the oil pressure. i don't know how to hook up the other gauges (fuel, temp, battery)

Thealien · 12-16-2009, 09:33 PM

try again

Thealien · 12-16-2009, 09:39 PM

I have a full size front to back diagram I would be happy to email to anyone

chevygrl68 · 12-16-2009, 09:53 PM

oh! i actually have that diagram too.. i just didnt print that page cause i was working on something else at the time! lol wow i feel kinda silly

but another ? - my speedometer says im going about twice as fast as i actually am... how is this fixed?

chevy88 · 12-16-2009, 10:04 PM

Go to a tranny shop to get the right plastic gears in transmission tail end where cable hooks up.

Legolas894 · 12-20-2009, 09:07 PM

Make sure you have the right harness. Some of the wires go to different places. Also, the sending units on the block may not be working for oil pressure and temperature. These are still available and not hard to fix. The fuel gauge can be a different story. There is a fuel sender in the fuel tank behind the seat. If you remove the single wire that is on the sender and touch it to ground, the gauge should read empty. If the gauge doesn't move, you might have a wiring issue or a bad gauge. If the gauge goes to empty when you touch the wire to ground, you have a bad sender. These are around $30 for replacement.

Make sure all your grounds are good as well. Theres a grounding tab on the gauge cluster too. Sand off the rust...

12-16-2009, 10:44 AM	#1
chevygrl68 Registered User Join Date: Nov 2009 Location: Denver, Colorado Posts: 28	help with gauges i'm trying to make all of the stock gauges functional in a 68 shortbed pickup.. but i'm new at this stuff and i'm not exactly sure how to hook them up! oil pressure and speedometer i've done... need help on the rest!

12-16-2009, 10:53 AM	#2
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,126	Re: help with gauges Welcome. On mine the AMP gauge wasn't working because a couple of small fuses were blown on the radiator support (little black rubber fittings in the middle of the wire). This is on a 72 not sure if yours is the same. Is your gas gauge working?

12-16-2009, 09:09 PM	#3
chevygrl68 Registered User Join Date: Nov 2009 Location: Denver, Colorado Posts: 28	Re: help with gauges no fuel gauge is not working. i don't know which wire or wires need to be hooked up to it.

12-16-2009, 09:12 PM	#4
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,126	Re: help with gauges Sorry I tried to link to the FAQ thread with the wiring diagrams but the pictures are gone I tried to upload the pictures to photobucket but they are in the wrong format. I tried to upload the pics directly but the files are too large!! If I resize them they may not be readable!! Last edited by Thealien; 12-16-2009 at 09:17 PM.

12-16-2009, 09:15 PM	#5
chevy88 Registered User Join Date: May 2007 Location: Southern, Saskatchewan Posts: 640	Re: help with gauges Where are the wires unhooked at the gauge or fuel sender on tank? __________________ Kerry My build thread. http://67-72chevytrucks.com/vboard/s....php?p=3657823 1971 Chev SWB with 68 nose, 6.2 diesel th350, and 3.73 rear gears 1988 Chev Extendacab 2010 Honda VT1300CS Sabre 2005 Buick Rendezvous wife's ride

12-16-2009, 09:27 PM	#6
chevygrl68 Registered User Join Date: Nov 2009 Location: Denver, Colorado Posts: 28	Re: help with gauges wires are unhooked from the gauge. i replaced the entire gauge cluster - i hooked up the speedometer and the oil pressure. i don't know how to hook up the other gauges (fuel, temp, battery)

12-16-2009, 09:33 PM	#7
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,126	Re: help with gauges try again Attached Images

12-16-2009, 09:39 PM	#8
Thealien Senior Member Join Date: Jun 2007 Location: Pine Ridge Florida Posts: 4,126	Re: help with gauges I have a full size front to back diagram I would be happy to email to anyone

12-16-2009, 09:53 PM	#9
chevygrl68 Registered User Join Date: Nov 2009 Location: Denver, Colorado Posts: 28	Re: help with gauges oh! i actually have that diagram too.. i just didnt print that page cause i was working on something else at the time! lol wow i feel kinda silly but another ? - my speedometer says im going about twice as fast as i actually am... how is this fixed?

12-16-2009, 10:04 PM	#10
chevy88 Registered User Join Date: May 2007 Location: Southern, Saskatchewan Posts: 640	Re: help with gauges Go to a tranny shop to get the right plastic gears in transmission tail end where cable hooks up. __________________ Kerry My build thread. http://67-72chevytrucks.com/vboard/s....php?p=3657823 1971 Chev SWB with 68 nose, 6.2 diesel th350, and 3.73 rear gears 1988 Chev Extendacab 2010 Honda VT1300CS Sabre 2005 Buick Rendezvous wife's ride

12-20-2009, 09:07 PM	#11
Legolas894 Chemist under the hood... Join Date: Apr 2009 Location: Fort Erie,ON, Canada Posts: 617	Re: help with gauges Make sure you have the right harness. Some of the wires go to different places. Also, the sending units on the block may not be working for oil pressure and temperature. These are still available and not hard to fix. The fuel gauge can be a different story. There is a fuel sender in the fuel tank behind the seat. If you remove the single wire that is on the sender and touch it to ground, the gauge should read empty. If the gauge doesn't move, you might have a wiring issue or a bad gauge. If the gauge goes to empty when you touch the wire to ground, you have a bad sender. These are around $30 for replacement. Make sure all your grounds are good as well. Theres a grounding tab on the gauge cluster too. Sand off the rust... __________________ Current fleet: 2013 GMC Sierra, 5.3L, 4x4 1988 GMC Sierra, 305, Auto 1984 Jeep Grand Wagoneer, 360 V8 1997 VW Cabrio, 2.0L 2017 Toyota Rav4, 2.5L Stuff I wish I still had: 2013 Toyota Matrix [RIP] 1967 GMC 910 Fleetside, 283 V8 [1st Love-SOLD] 1987 Jeep Cherokee Laredo 4X4, 4.0 I-6 [SOLD} 1994 Chevrolet Caprice Classic, 5.7LV8 [SOLD] 1995 Chevrolet Astro AWD, 4.3L V6 (RIP) 1998 Chevrolet Suburban 4x4, 5.7L V8 [SOLD]



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