WOW.A guy at the local U-Haul place helped me at his store and finally hit upon the solution. He found it on-line (why my searches did not find it I am not sure)and it turned out to be 2 small 10amp fuses up under the dash, above the gas pedal, that were just in-line type in small clear plastic holders/cases and taped to one of the cable bundles. Both were burned out and when replaced the turn signals were back in business. How they worked without the trailer hooked up, why they worked when I applied the brake, etc. Who knows. But in case the issue comes up for others, please know these 2 fuses are up there, and somehow control something that allows trailer turn signals to work.
Thank you guys for your suggestions and efforts to help me out.
Friday, December 24th, 2010 AT 2:38 PM