2000 EXPLORER INTERMITANTLY WONT CRANK OVER. STARTS FINE IN THE MORNING. DRIVE 5 MILES AND WHEN YOUR TRY TO START AGAIN THERE IS NOTHING. REPLACED BATTERY, STARTER, IGNITION, STARTER RELAY, NEUTRAL SAFETY. THE REMOTE STARTER STOPPED WORKING AT THE SAME TIME. MECHANIC NOW SAYS IT NEEDS A GEM BUT I HAD NOT HEARD THE GEM KEEPS IT FROM TURNING OVER SOMETIMES. ITS A 4, 0 SOCH 4X4. ALSO NOTICED WHEN IT WONT START THE HEADLIGHTS GO OFF COMPLETLY. THAT USED TO TELL US THE STARTER WAS GETTING POWER BUT WHO KNOWS ON TODAYS CARS.
Maybe poor ground G104 rear left fender grounds both starter relay and headlights. Your right GEM not the problem
February, 16, 2013 AT 6:13 PM
Ill look but I cant see any relationship to it since it starts fine in the morning of after letting it sit for a few minutes and once it cools off it starts fine. If the ground was bad why would it start fine again without it touching or moving the car?
February, 16, 2013 AT 6:36 PM
I found this but its mechanic lingo. Can you put in shade tree terms?Perform PCM Quick Test: If PATS Diagnostic Trouble Code's (DTC's) exist, go to PATS diagnostic in Explorer/Mountaineer or Aviator Workshop Manual Section 419-01.
If powertrain DTC codes exist go to PCED Manual Section 4.
Check for loose connection of the B+ battery cable to the Battery Junction Box (BJB): If connection is loose, torque battery cable terminal nut on BJB to 144 lb-in. (16.4 N-m).
Check for proper torque on starter solenoid terminal nuts: The B+ terminal nut should be torqued to 144 lb-in. (16.4 N-m) and the S terminal nut should be torqued to 65 lb-in. (7.4 N-m).
Inspect PCM power ground for good connection. Ground connection G104- Explorer/Mountaineer or G108-Aviator is located on the bulkhead above PCM as illustrated in Explorer/Mountaineer Wiring Diagram 151-17 or Aviator Wiring Diagram 151-1: If connection is loose, remove ground attaching bolt from bulkhead. Clean and inspect bolt and re-install. Torque to 95 lb-in. (10.8 N-m).
Inspect connections in Battery Junction Box (BJB): Inspect for discoloration of PCM power relay terminals (indicating poor connection to relay terminals in BJB). See Explorer/Mountaineer/Aviator Wiring Diagram, Section 11, for illustration of relay locations in BJB.
Wiggle wires leading to the BJB and check for loose connections.
Check seating on the starter, PCM, and fuel pump relays.
NOTE: DO NOT REPLACE PCM IF NO CRANK CONDITION CANNOT BE REPRODUCED. PCM REPLACEMENT IS NOT AN EFFECTIVE REPAIR FOR INTERMITTENT NO-CRANK.
When all inspections are complete, clear DTC's, restore vehicle, and return to customer.
February, 16, 2013 AT 8:02 PM
PCM quick test basicly visual checks and scan PCM for codes so if no check engine light on check BJB for battery connection tightnes
Check G104 lose or corroided grounds will have less resistence when vehicle not running for some time as it runs and current flows through connection it heats up and resistence increases to a point where component does not function.
Does this help?