Ford won’t start
Fix no crank no start Ford
Ford has issued a technical service bulletin (TSB) 03-13-06 to address a no crank, no start, condition on the following vehicles:
2003 Lincoln Aviator
2002-03 Mercury Mountaineer
Ford advises that you check for a loose connect of the battery cable to the junction box. If it’s loose, tighten to 144-IN/lbs (not ft/lbs). Next, check for looseness at the B+ terminal of the starter solenoid. The B+ terminal should be 144-IN/lbs (not ft/lbs) and the S terminal should be 65-IN/lbs (not ft/lbs). If that still doesn’t fix the problem, move on to checking ground at the PCM.
Since the PCM provides ground to activate the starter relay, check the ground connection for the PCM. It is located on the bulkhead above the PCM. If the connection is loose, remove the bolt, clean the surface, and re-install the bolt to 95-IN/lbs (not ft/lbs).
Next, open the battery junction box and check for discoloration of the PCM power relay terminals. That would indicate poor connections. Also, wiggle the wires leading to the battery junction box to check for looseness. Finally check the seating on the starter, PCM, and fuel pump relays.
If the odometer display is normal and battery voltage is at least 12.5 volts, connect a jumper wire from pin 39 in the PCM connector to ground. Then place shifter in PARK and try to crank engine. If it cranks and there’s no evidence of damage to pin 39, replace the PCM. If the engine does NOT crank, and you’ve checked all the wiring connections shown above, swap the starter relay from another circuit.
Dashes in odometer display
Check all of the above connections. Also check the PCM ground integrity at the PCM connector. Disconnect connector and connect one lead of a digital multimeter to ground. Set the scale to ohms. Then check resistance readings on 24, 25, 26, and 27. Readings should be below 5 ohms. If it’s greater, repair the poor ground connections. Next, turn the key to ON. Connect one lead of your meter to a good ground. Set meter to volts. Check pins 32 and 33 on the bottom of the PCM connector. Reading should be the same as battery voltage. If the reading varies downward by 1 volt or more, diagnose the power supply circuit for excess resistance.
© 2012 Rick MuscoplatPosted on by Rick Muscoplat