That resistance measurement has a * in the manual, and the star states:
"The values signified with a * are going to
vary from ohmmeter to ohmmeter because these terminals are connected to the filter
capacitors, which try to charge themselves off the battery in the meter, causing a
fluctuating reading. If the circuit is connected properly these readings will wander in the
tens or hundreds of Kohms or higher range."
Your resistance measurement is consistent with this, so you can proceed to voltage checks.
-PB