Thanks for the reply. For those who may review this brief thread ... the problem turned out to be no +12 voltage at the relay. The relay schematic shows two pins that are connected internally. A meter showed no voltage at either sleeve with the relay removed / key in ON position. Options appeared to be (1) pull the whole fuseblock (yikes!), or my choice, (2) create a double-insulated adequate guage wire between the protected side of the fuse and and one of the relay posts. Some may view this as a hack job, but I'm confident in it's safety and reliability.