Ok here is the issue. I have a RPM data logger with a Daytona Sensors WEGO IIID system for reading the AFR. Everything has worked great for years but I just created a problem when converting to 16 volt battery and adding an alternator. The WEGO system will only work up to approx. 16.5 volts and with the alternator charging it will see almost 18.5 volts. Anything over 18 volts the WEGO will go into a default mode. Is there an easy way to reduce/limit the input voltage to the WEGO to around 16.0-16.5 volts?? The WEGO system will pull up to 1 AMP.