Voltage drop????

[MBuhrig]

Hello all,

New here with my 1997 H1 Two-Door.

I have a problem with voltage drop when using indicator light and/or headlights. Any time either head or indicator lights are on my voltage drops to 12v or so causing all my guages to jump. This is even worse when head lights are on, and gauges display wrong oil pressure, temp etc. I replaced one battery which I load tested and found to be bad, however the new battery made no difference and the problem continued. With lights off the volt meter shows about 14-15v. Is this an alternator problem? What should I try next before heading to the local dealer?

Thanks for any input.