Substitute hazard flasher for turn signal flasher when pulling a trailer?

[Rimjam]

Problem solved. Prowled another friend's Ranger stash & gathered up 6 thermal flashers. All are either #224 or #552 (various brands). One was an HD 552, that's the one that did the trick. With tow dolly lights connected the turn signals may flash a tiny bit faster but not enough to notice. Franklin2's comment above was spot on.