Hello everybody, I have replaced the alternator, the battery, and the voltage regulator,but I still seem to have a battery drain somewhere only after driving at night.I have noticed that on this car ('68 Buick Special) the negative battery cable from the battery is connected to the inside passenger fender.I seem to recall that the negative cable on my '67 GS 400 and my '68 Wildcat were bolted to the alternator bracket assembly.Is the fender connection correct or did the previous owner ground the cable there? All of my lights work fine.The only problem that I have is with the gas gauge not workng. Any ideas as to what the problem might be? John
John, Alot of the early cars had a 10-12ga. jumper from the battery negative to the passenger fender. This really isn't a great idea. The most effective way to ground the car is to run your main negative battery lead to the engine block. Run a ground strap (equiv to the OEM braided style) from the body tub (usually one on the fire wall) to the engine block (intake manifold bolt is good). Run a ground strap (same style as above) from the frame to the engine block (can be done at the same point as the main battery negative lead) Run an additional frame to body ground strap back near the taillights. - To isolate your battery drain disconnect the battery negative lead and install an amp meter (set to DC amps) between the negative post of the battery and the negative battery cable, if you have a drain you'll see it at this point on the meter, then go to the fuse box and start pulling fuses one by one checking the meter after each, when the meter drops to zero, you found your circiut. You can also disconnect sections of the wire harness to isolate this.
