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#1
08-23-2013, 01:45 AM
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Volt Guage Issue 74 Formula
A while back my Volt guage quit working, today I decided to look at it.
I Started by swapping in another Gas / Volt guage. Same as the original, Gas Gauge works / Volts Don't. Tested both Volt Guages off the battery and they worked. Checked for Voltage on the plug and get none ( Can a bad ground cause this ) During the investigation I found out that when I turn on the lights the gas guage quits working ( Confused )
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74 Formula Below motor destroyed last fall 469, 6X-4's, 72 Intake, Ramair Manifolds. 3 inch exhaust with x-pipe Custom Roller Cam, 1.52 Roller Rockers Quadrajet done by Cliff 3:42 gears 12.061 @ 110.74 12.092 @ 112.43 12.128 @ 111.71 New motor 461 stroker Edelbrock 87 cc dport heads Performer RPM Same Ram Air manifolds, and quadrajet Results will be posted after the track 
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#2
08-23-2013, 07:43 AM
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Yep, the cluster has a bad ground. Fix that first before diagnosing the volt meter.
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1971 Pontiac GT-37 Car is a junk yard dog and maybe one day will be restored. 
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#3
08-24-2013, 08:12 AM
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Lookin at the diagram I have albeit a 73 the ground also is for other items...cig lighter, compartment light and Rear defrost ....which branch off and go to the cluster
The feed for the Volt meter comes from a fuse which looks like it branches off the brake pedal switch and 4 way flasher Check your fuses....if there is no power ( key on ) with a test light at the Voltmeter ( plug disconnected from the gauge ) u have a broken wire....or bad fuse If the dash lights are playing tricks I agree check the cluster ground as well.....if I;m not mistaken its a metal strap in the left upper corner of the cluster mounting screw from the body to the cluster make sure its clean The voltmeter is in the centre of the page with the hashed orange and black wires..now this could be all wrong cause this is a 73 diagram and 74 could be different...
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 1973 Firebird Navajo Orange w/shaker,1973 400/461,1972 Intake SD CNC'd,1977 Q-Jet 800 CFM w/ Cliffs Kit,Tanks Inc PA4 255 Walbro intank pump ,-8an feed/return,RobbMc Regulator,RobbMc 40 micron filter,253 CFM 6x-8's w/H.S 1:5 Roller Rockers,SD Stump Puller H/R Cam 230/236 @.050 112 lobe separation 565/.570 lift,Crower Solid Rollers,28150 Hedman Headers,3" exhaust,full tailpipes,350 Turbo,9.5" 3200 Converter,3:42 gear,8.5 posi,C/E slide-alinks,Koni adj frt shocks,Best 12.18@110.55 Lookin for 11's
Last edited by cnc; 08-24-2013 at 08:20 AM. |
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