Question: OLP Stingray Bass

I have a friends OLP Stingray on the bench for some electronics diagnosis.
Single HB, 2 volumes, 1 tone. (passive)
The complaint is that the tone control does nothing until ~ 90% roll off.

I looked under the hood, and found the ground wire off the 2nd volume pot, and a 104 cap on the tone control. Both volumes work fine, but the tone control doesn’t affect the tone on either coil until you reach the end of travel and then it just rolls the highs off.

I couldn’t find any info on the OLP version. Any help or suggestions are welcome.

Thx !