Wire Harness - EFI-ETC
The instructions for the removal of the wiring harness for EFI-
ETC engines can be used as a stand-alone instruction on an
assembled engine OR in conjunction with the disassembly
process of an engine.
If you are removing the engine wiring harness as a part of the
disassembly process, reserve the instructions to disconnect
the harness from various components until those components
are to be removed on the engine.
83
NOTE:
The anchor on the fir tree style clip (
A
, Figure
83) resembles an upside down fir tree. Due to the rib
configuration, the anchor is a very tight fit. To avoid damage
to the clips and/or engine components, use the Briggs &
Stratton Fuel Line Removal Tool (
B
) to gently pry the clip
from the anchor hole. If the clip is broken during removal, be
sure to remove all plastic debris from the engine.
1. On starter motor side of engine, press tab and
disconnect main vehicle connector (
A
, Figure 84).
2. Disconnect electric lift fuel pump connector (
B
).
3. Remove elbow spade socket terminal (
C
) from starter
solenoid spade contact.
4. Remove elbow spade socket terminal (
D
) from oil
pressure switch spade contact. Remove wire harness
retention clips, if still attached.
5. Disconnect fuel pump module connector (
E
). Pull out
gray secondary lock, and then press and hold tab before
pulling apart connector halves.
6. Remove O
2
sensor conduit from clip (
F
) at top of fuel
pump module bracket support.
7. Remove hex flange screw to release wire harness
clip (
G
) capturing O
2
sensor and EHT sensor conduit
from fuel pump module bracket support. Remove clip
from wire harness.
8. Disconnect O
2
sensor connector (
H
). Press tab to
remove grey secondary lock, and then press black tab to
separate connector halves.
9. Remove fastener to release EHT sensor (
I
) from cylinder
head.
10. Disconnect fuse/relay block (
J
) from cover.
11. Disconnect CKP sensor connector (
K
).
12. Disconnect cylinder 1 ignition coil connector (
L
, Figure
85) after removing anchor of rosebud style clip from
boss at rear of intake manifold. Pull out red secondary
lock, and then press and hold tab before pulling apart
connector halves. Remove 2 fasteners to release ignition
coil from intake manifold bosses, if necessary.
13. Disconnect cylinder 2 ignition coil connector (
M
, Figure
85) at front of intake manifold. Pull out red secondary
lock, and press and hold tab before pulling apart
connector halves.
14. Disconnect cylinder 1 fuel injector connector (
N
, Figure
84) after removing anchor of fir tree style clip (
O
, Figure
85) from boss at front of intake manifold. Pull out white
secondary lock, and press and hold tab before pulling
apart connector halves. Remove fuel injector cap
fastener if connector is caught beneath fuel rail.
15. Disconnect cylinder 2 fuel injector connector (
P
, Figure
84). Pull out white secondary lock, and press and hold
tab before pulling apart connector. Remove fuel injector
cap fastener if connector is caught beneath fuel rail.
16. Remove anchor of fir tree style clip (
Q
in Figure 85) to
release wire harness from intake manifold boss.
17. Disconnect ECM connector (
R
).
18. Remove fastener to release ECM ground wire ring
terminal (
S
) from throttle body.
19. Remove fastener to release engine ground wire ring
terminal (
T
) from crankcase boss.
20. Proceed as follows:
A. Cylinder 2 (Oil Filter) Side:
• Remove fastener (
U
) to release fuse/relay block
bracket (
V
) from double-sided clamp (
W
) at top
of intake manifold.
• Rotate fuse/relay block bracket outward.
• Remove fastener (
X
) to release clamp from
intake manifold boss.
• Remove wire harness from clamp.
B. Cylinder 1 (Starter Motor) Side:
• Remove fastener to release wire harness clip
(
Y
, Figure 85) from intake manifold boss.
21. Remove the 3 fasteners to release fuel pump module
bracket from fuel pump module bracket support. Move
assembly up and out of the way.
22. See inset of Figure 85. Remove fastener to release air
block plate from crankcase. Rotate plate in a counter-
clockwise direction to enlarge opening for harness
removal.
23. Feed branches of wire harness down and then out
through opening next to air block plate.
74
Summary of Contents for BIG BLOCK M540000
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