Originally Posted by NachoRT74
Originally Posted by Sinitro
In the START position, U should have 12V on both ballast resistor terminals.
In the RUN position, U should have 12V on the ballast resistor input terminal and 8-9V on the output terminal.

Just my $0.02... wink


50% correct.

In START you get the voltage reading reversed to the RUN position. Hence why the brake light (and oil if present) dims out while cranking. They (brake and oil light) are feeded from the RUN circuit throught the ballast.


Clarified that. Though Sinitro is correct in respect to voltage going to the coil.