76 Eldo auto door locking

This is driving me nuts. My 76 Eldo convertible has auto door locking when the shifter is moved to Drive EXCEPT that it doesn't work until the car warms up. Once warm, it is fine. I cannot find the relay that controls
this. It is different than the manual lock relays according to the wiring diagram. I can't stick my head under the dash and shift into Drive (which releases the brakes) as everything starts moving! Can anyone direct me to the relay and/or have ideas about what is heating up to start working?
Thanks, Donn
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.