Onan 7500 Quiet Diesel Trouble Code 32 FIXED

You might try measuring the voltage at the generator post (not the cable) while cranking the generator. Use the negative post on the generator for the (-) probe and not the frame. A low voltage while cranking (or attempting to crank) usually indicates problems on the wiring. Check any connections along the cable including the battery posts.

Also, make sure your generator is well grounged.

Thanks for the reply. I cleaned and tightened the elec connection at the stud....no difference. It looks to me like the genny will have to be removed from the MH to check internal wiring connections.
the genny is not mounted on a slide. Is there a way that is not obvious to me to check wiring to the starter?

per our manual, code 32 is low cranking speed fault and
if fuse 32 is ok, then probably have bad battery connections or weak batteries.
So... check for corroded or loose connections / tighten all battery connections. Voltage at post may be fine but not enough current getting through to motor due to high resistance somewhere in the circuit.