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Topic: Low fuel light stays on

in Forum: C3 Electrical


Low fuel light stays on

Posted: 2/16/05 6:43pm Message 1 of 6
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Colorado Springs, CO - USA
Joined: 9/11/2004
Posts: 67
Vette(s): 1978 Silver Anniversary Edition Paint, L-48, Matching numbers, 350 c.i, 625cfm Demon Carb, Weiand Stealth intake, 268 Custom Ground Cam, 10:1 heads, Jet Hot Hooker Headers, 3:73 rear end.
After successfully installing a new MSD ignition on my 78. The low fuel light now stays on constantly. I called MSD they said that the condenser that I installed on the brown wire on the alternater was installed upside down. I looked at it, it was installed correctly. Is there anyone that hashad this happen and how do I fix it?


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Low fuel light stays on

Posted: 2/16/05 8:22pm Message 2 of 6
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
What the heck would an ignition set-up have to do with the fuel light? Doesn't make any sense to me. If the MSD folks said the condenser was "upside down", could they explain why that would cause the problem? Did you change the condenser around to see if it made any difference? If you figure this one out, I'd be curious to know what the two had in common in order for the fuel light to stay on. Good luck; maybe someone here has the answer!


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Low fuel light stays on

Posted: 2/17/05 8:48pm Message 3 of 6
Former Member
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Colorado Springs, CO - USA
Joined: 9/11/2004
Posts: 67
Vette(s): 1978 Silver Anniversary Edition Paint, L-48, Matching numbers, 350 c.i, 625cfm Demon Carb, Weiand Stealth intake, 268 Custom Ground Cam, 10:1 heads, Jet Hot Hooker Headers, 3:73 rear end.
This is exactly what we thought. There is an adapter that I need to install to make my Tach operational. When I hook that up maybe the fuel light will mysteriously disappear. Also I think that the smaller wire going into the alternator may be a low voltage wire for the dash. But if that were true the rest of the dash would light up like a Mardi Gras float. Thanks for the feedback. I will let you know when I'm done with the Tach. Hopefully I won't create any more problems. As we all know the electrical systems in our Vettes are poorly designed and extremely  touchy.


Low fuel light stays on

Posted: 2/19/05 9:58am Message 4 of 6
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Joined: 8/23/2004
Posts: 7

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L82-197738407.7067592593


Low fuel light stays on

Posted: 2/22/05 3:10pm Message 5 of 6
Former Member
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Colorado Springs, CO - USA
Joined: 9/11/2004
Posts: 67
Vette(s): 1978 Silver Anniversary Edition Paint, L-48, Matching numbers, 350 c.i, 625cfm Demon Carb, Weiand Stealth intake, 268 Custom Ground Cam, 10:1 heads, Jet Hot Hooker Headers, 3:73 rear end.
Thank you very much Gary. I will replace the module this weekend. As you know wiring the tach adapter had nothing to do with the fuel light. The tach now works. Thanks again for the solution Gary.


Low fuel light stays on

Posted: 2/22/05 3:38pm Message 6 of 6
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Joined: 8/23/2004
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in Forum: C3 Electrical


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