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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2011 Posts: 148 Shop Shark | | Shop Shark Joined: Sep 2011 Posts: 148 | I have a 49 pickup, I was told that it had been converted to a 12volt system and I have noticed that there is a resister on the block that I assume keeps from frying the points, but I have lost all my dash lights and my gas gauge is pegging full when I turn on the key. I have been reading some of the problems that guys are having with their sending units and hope that mine may be different. Do I need to put a resister somewhere in line to keep my gauge from pegging full all the time or do I just start checking out grounding problems, float problems and wiring problems? If I do need a resister, where exactly does it need to go, I am sure with the heat that is generated with these resisters, that will be a big concern. So I would appreciate any advice on this gas gauge situation, Thanks. | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | the only way the dash lights would be affected is if they weren't changed to 12V bulbs, easy fix - for the gas gauge, if it always only reads full it's likely been fried already by not having the dropping resistor .... those resistors don't get hot enough to be a big concern, usually just mounted under dash in the line from power source to gauge [ see EL110 here] Bill | | | | | Joined: Mar 2010 Posts: 10,298 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,298 | Fuel gauge pegged with ignition switch on is a classic symptom for no ground to sending unit.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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