airtronics rd8000 problems

[1985 kenworth]

yes it has the mfu unit in it .the receiver does not appear to have any lights on it anywhere .i just turned on the radio and using another battery i plugged into the mfu unit and when i turned on the mfu the front wheels flickered for a split second like the servo was having a spas attack,that was it nothing else .the mfu light is on the radio says 10.4 volts but nothing,will any bind plug work ..i have a gut feeling it has to do with this receiver .i had a problem with the radio and receiver in my Blue Mule tractor ..it worked fine for about a year then one day it went screwey..the front wheels were shaking the truck would surge forward for no reason so to be safe i changed out the electronics from the futaba to the spektrum..i had no problems since .before i go buying and changing out all the electronics i really would like to have exhausted any and all probable causes first