Join Date: Mar 2002
Location: Austin, TX, USA
Re: drivers side tail light not as brite as passenger side
Check the voltage drops in each leg of the headlamp circuit. Meaure battery (-) to the ground pigtail. You should see less than 0.1 volt. Then measure battery (+) to each hot feed (low and high beam). Again you should see less than 0.1 volt.
Do these tests for each side. If your numbers all come out less than 0.1 volt, there is something different about the headlamps themselves. I suspect you'll find one of those tests gives you a higher reading which indicates a bad connection in that circuit.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI