Cruise control will not work .

The male connector by the brake light switch, is for power. If it's the speedo that's bouncing, it will be ok. If it's the cable from the trans to the servo, that's the one that has to be rock steady.
OK , I missed that about the mail connector is power . looks like a brown plastic plug that might have clipped onto something that is hanging there. nothing plugged into it. it's by the 3 wires that come thru the firewall. someone may have tpped into for power . I have to check if hot / power .