In replacing the heater core, I am trying to check the ducts for airflow but not getting any response from the 3 speed blower switch.  Have a post on the dash removal as this is the project.  New heater core and now trying to check.

You may have to replace the resistor assy, it's on top of the motor housing in the engine bay.

Start with the simple stuff. You've already checked the fuse, so next is to make sure the fan is plugged in, and it has the ground wire attached to the metal part of the flange...and make sure that ground is nice and tight against the metal. It sounds like you have power to the switch, and the relay is working. IF the fan does not blow on ANY speed, I'd be looking at the fan itself...make sure it's plugged in, and has a good ground. Also, check for voltage at the fan connector itself...

If you have a test light check the hot going to the blower motor. If it lights and you have ground it will be your motor. If the resistor is out, in most cases the motor will run on high but not on lower speeds.

Bring it to Carlisle August 24 and we will put the team on it. If you need parts you will find them at Carlisle.

I like that idea!!

Yes I would like to bring it to caslisle but want to check the ducts and vacuums before I put the dash back on so need to bet the blower working first to check the ac controls and vacuum lines first.

Ok the blower relay is clicking and I have voltage there,but the connection to the blower motor I have no voltage from the wires going into the blower. Put a test light on the grd and one connector I get a light but putting the voltmeter on the connection no voltage going into the blower from the wire connector. The relay clicks and cannot trace the wires that lead to the blower motor they are in a harness. Fuse at the fuse box is good power at the blower switch, but the final connection to the blower there is no juice in that wire from the harness? Bb78

If the relay is good and you have no power to the connector, it sounds like a bad connection or broken wire from the relay to the motor. If the wires are color coded try checking for continuity between the connector and the hot coming off the relay. Or maybe splice a temporary wire between the two. You'll get it.

OK for the update, partly in the rush to get it back together I might have been testing the wrong part.  I think I ws looking at the relay that I guess goes to the a/c part and not the blower that is sort of under the fender.  The relay was working fine but I was not getting any power to the 4 prong plug that was connecting to the ac unit.  SO MY BAD BUT NOW LOOKING AT THE BLOWER, i ONLY SEE A 1 WIRE THAT IS ATTACHED TO THE FRONT AND IT LOOKS MAYBE LIKE A grond and then another wire with like a rubber bullet  shape and a metal prong inside but not attached to anything???LIKE I SAID THE BLOWER WAS WORKing a while back but I did not remove any wires.  The manual does just show maybe 2 wires to the blower but 1 looks like it goes through a capacitor for the radio???  I am looking at the electrical wiring chart and have not found a good look at the blower but cannot find where electric is going to it.