1 - 14 General Information 5.0/5.7/6.0/8.1L
MEFI 4 - PCM
Important
•
To ensure proper engine operation after repair of
connector assembly, wires must be in proper connector
location. Before removing index cover, note if there
are any wires of the same color. Mark these wires from
the location that they were removed. For the remaining
wires, their location can be found by referring to “Wiring
Diagrams” in the Diagnosis section. The strain relief is
numbered for identifying wire location.
10. Index cover (4) by pushing in on Tabs C with a small
screwdriver.
11. Terminals by pulling out of connector.
12. Seal (2) from wires.
13. Strain relief (1) from wires.
Clean and Inspect
•
Terminals for corrosion.
– Use spray electrical contact cleaner.
•
Loose crimps on terminals.
•
Broken wires at terminals.
Notice: For terminal replacement, refer to instructions
found with terminal repair kit and crimper tool.
Install or Connect
1. Align index cover (4) on connector (3) and lock into
position. Make sure Tabs C are locked.
2. Align seal (2) on connector (3) and slide all the way
on.
•
DO NOT install strain relief (1) onto connector (3)
yet.
3. One wire with terminal installed, through strain relief
(1) in location that it was removed.
•
Start with the lowest numbered wire position for
that connector.
4. Terminal through seal (2), connector (3) and into index
cover (4) until it locks in place.
5. Remaining wires one at a time per same method.
•
Keep wires straight.
•
DO NOT kink wires.
6. Strain relief (1) onto seal (2) and connector (3).
7. Lock Tabs B into strain relief (1).
8. Plugs into strain relief (1) where there are not any
wires.
9. Fold strain relief (1) together and lock Tabs A.
10. Connector assembly to ECM.
11. Negative battery cable.
Micro-Pack 100/W Series Connectors
Figure 1-8
The harness connectors used with the ECM “J1” and “J2”
connectors are Micro-Pack 100/W Series. It is used for its
ruggedized construction, capable of carrying more current
and provides good sealing ability. The connector is made
up of fi ve different parts (refer to Figure 1-8 View A): Strain
Relief (1), Seal (2), Connector (3), Index Cover (4) and
Terminals (not shown).
Remove or Disconnect
1. Negative battery cable.
2. Connector from ECM by lifting up locking tab with
thumb and pulling on connector body.
Inspect
•
Check strain relief for being cracked or locking tab
damaged.
•
Check index cover for being cracked.
•
Check seal for being torn, twisted or out of shape from
improper installation.
•
Check terminals for being corroded, out of position,
bent or stretched out.
–
Use a wire gauge .038 for checking terminal
internal fi t. Wire gauge should slide with smooth
feel and not be loose.
Notice: If you are only going to clean terminals, complete
disassembly is not necessary. Remove index cover from
the connector by pushing on Tab C on both sides and
sliding off cover. Care must be taken not to move terminals
out of their position. The index cover locks the terminals
in position. If repair or replacement of parts is needed, DO
NOT remove index cover at this time.
3. With a small screwdriver, move Tabs A on strain relief
(1) to unlock position.
4. Open strain relief as shown in View B.
5. Release Tabs B (View C) on connector (3) by pushing
inward with both thumbs or small screwdriver.
6. Push Tabs B through strain relief (1) with thumbs or
small screwdriver while in released position.
Important
•
Where there are not wires in strain relief, small plugs
are installed. DO NOT lose the plugs, they are important
to help keep connector assembly sealed.
7. Remove plugs where there are not any wires.
8. Slide strain relief off of seal and back on wires.
9. Slide seal off of connector and back on wires.
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