I have a 1996 Ranger 2wd 4cyl 2.3 auto trans,135K miles

The CEL Code light is on with a code of P0761 and the OD light flashes around 60-70 MPH. The 10amp fuse that controls the OD, DRL and Back up light blows as soon as the truck is put in gear.
I have replace the 10 amp fuse a number of times and also checked for shorts to the backup lights but have found no issues although I may have missed it.

I have had the problem for about 10 months so I think it may be a simple fix. Any ideas on where to check for a wire short or other easy fix?

Please help with a diagnosis........

Thanks
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