Electrical problem
2000 Ford F250 V12 Two Wheel Drive Automatic I have a Ford F250 truck with 6.8ltr V10 motor. The dome light will flicker when you open the door when you turn the key to start All the lights in the dash will flicker and there is a relay behind the dash which chatters with a noise rather like a switch short circuiting. After trying to start it everything goes dead, no light not a thing. After a short time power will come back on. With door shut and truck off the Relay switch will chatter. No fault codes are detected by the scanner. The relay which appears to make the noise is is a small black and in for the inside lights. Changing the relay for a similar one does not cure the trouble.
Any ideas?

 

sounds like a dead battery or loose battery connection. I would start there.

 

Thank you after I posted I found the problem. It was a bad ground
Thank you for your help