Stewart Warner Electric Speedo

[Shoebox]

Forgive me if this is a bit "off topic" for here but there are some really electrically savvy guys here. So, I have an electric SW speedo in my '32 fed by a GPS module, it has worked well and I don't have to change anything when I change gears in the quick change rear end. Yesterday I get in to go for a Fall drive and right away I see something wrong, the needle is at rest at the high end (see pic) and once underway there is no movement. IF it was just no needle movement I'd check power to GPS module and from it to speedo (will still do this) but that needle pegged as it is has me puzzled. Any thoughts most welcome. Thanks.