C.E. Niehoff & Co. C706:A9-4029 Regulator Harness Replacement - Manual (Page 3)

If the gray fi eld connector is secured with wire ties only...
1. Clip wire ties inside control unit.
2. Disconnect existing wiring harness terminals:
a. Remove black and white wires from female
end and discard parts of female end of
connector. Do not remove pins from ends of
black and white wires.
c. Disconnect internal B+ connection, saving
hardware for reassembly.
d. Disconnect green ground wire from housing.
Save hardware for reassembly.
e. Cut red wire from diode trio in housing and
use sleeving to insulate. It will not need to be
reattached to new harness. See Figure 7.
f. Disconnect existing wiring harness from
thermal switch (see Figure 7):
1) Cut brown wire from existing harness to
thermal switch, leaving enough length
from thermal switch for reassembly, and
strip 1/4 inch of insulation.
2) Leave other brown wire to thermal switch
as-is for reassembly.
7. Using splice and sleeves from kit: crimp, solder,
and insulate brown wire from new harness to ex-
isting brown wire from thermal switch.
8. Reassemble internal B+ connection and hard-
ware as shown in Figure 9.
9. Attach new wire ties to firmly secure connector
and other wires inside control unit.
Black wire
White wire
FEMALE END
Figure 7 — Existing Harness Wiring
3. Remove existing wiring harness from housing,
taking the grommet out as well. Discard harness
and grommet.
4. Install wiring harness into notch in plate, making
sure grommet is securely wedged in notch.
5. Reconnect green ground wire in housing, Torque
screw and lockwasher to 3.4 Nm/ 45 lb. in.
6. Re-assemble new gray field connector:
a. Assemble new female connector end onto
black and white wires of new harness as
shown in Figure 8.
b. Save new male end of gray field coil connector
provided in kit to replace existing male end of
connector connecting field coil leads from shell.
Figure 8 — Field Coil Connector Assembly
Leave this wire alone
See step 2f
Figure 9 — Internal B+ Stacking Order
Hex bolt—torque to 27-28.5 Nm/20-21 lb.ft.
Disc spring washer
Flat washer
Thermal switch
Red wires terminal
from harness
Rectifi er terminals
See step 2e
II169B
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C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633