For those having trouble getting their tilt away mechanism to activate, here’s a tip that might eliminate one possibility. The vacuum motor relay. First off in order to test it it’s simple. The prongs are numbered 1 thru 4. Using an ohm meter check continuity between prongs 1 and 4 then check to 2 and 3. The prongs may have some corrosion that need cleaning but if you can’t get continuity between those points then the relay is not functioning properly. There are six pinch points that hold the plastic cap of the relay in the metal box it’s contained in. You can remove the relay from its box and view the internal which includes a coil which connects 2 and 3 and a copper tab that makes contact with ground and the case in prongs 1 and 4. The contact points after 50 years will have corrosion that you can clean off. I use a flat razor blade to clean what looks like contact points on an ignition distributor. Delicately clean the other parts without damaging anything. There’s a reasonable chance it will start working again. If after this you still don’t have continuity then check with WCCC for the aftermarket replacement. Hope this helps😎 6t8cougarguy@gmail.com
Great tip. Thanks for the info.