HEY ADRAIN , I RAN INTO ONE WITH THE EXACT SAME CLICK ON CLICK OFF THIS PAST WEEK, NEW GLOW PLUGS DIFF CONT, THE WHOLE BIT , THE OWNER WAS ABOUT TO GO NUTS OVER THIS THING , WELL WHAT IT TURNED OUT TO BE AFTER HE DROVE 60 MILES DOWN HERE I CHECK THE BATT VOLTAGE TO THE GLOW PLUG RELAYS , THE NO I RELAY WHICH IS TURNED ON AND OFF BY THE CONTROLLER HAD NO VOLTAGE ON THE MAIN SUPPLY LEAD FROM THE BATT FUSE LINK WHICH IS JUST A SHORT CONNECTION OVER TO THE NO 2 RELAY , NO 2 WORKED FINE , THIS PIECE OF WIRE WITH THE 2 RELAY CONNECTORS IS ONLY ABOUT 8-9 INC LONG, BUT THE MAIN LEAD FROM THE FUSE LINK IS SPLICED INTO THE WIRE ABOUT 4 INCH FROM THE END WITH A CRIMP SO IT WAS MAKING CONNECTION TO RELAY NO 2 , BUT NOT ENOUGH CURRENT COULD MAKE IT THRU THE CONN CRIMP, TO RELAY NO 1 FOR THE RELAY TO FEED THE GLOW PLUGS AND THE CONTROLLER SENSED AN OPEN CIRCUIT AND WOULD SHUT IT DOWN, A SHORT PIECE OF WIRE FROM THE 86 T DSL PARTS CAR AND IT WAS BACK AND WORKING FINE AGAIN, AND HE HAS HAD SOME 30 DEGREE MORN, FOR THE LAST COUPLE OF DAYS , CHECK THE FEED VOLTAGE ON BOTH THE RELAYS RIGHT AT THE RELAY IT IS ABOUT A 10 GAUGE WIRE AND IS SOLID BLACK JERRY