Blower Switch Replacement, Pre-CDTC Century, Columbia
& Argosy
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

> Century Class Conventional
> Argosy COE
Cargo
> Columbia

83-147
Freightliner
Service Bulletin

Coronado
Business Class M2
Cascadia
108SD/114SD

General Information
The blower switch (BOA 80 928 01 029) used in the forward control unit (FCU) on pre-constant-dischargetemperature-controlled (CDTC) Century Class, Columbia, and Argosy HVAC systems built prior to January 7,
2000 is no longer available from the supplier. If the switch requires replacement, use blower switch SPR 432
0012 000, and modify the wiring as directed below.

Replacement
1. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
2. Disconnect the batteries at the negative posts.
3. Remove the FCU from the dash, and remove the blower switch (BOA 80 928 01 029) from the FCU. For
instructions see 83.04, Subject 210 of the Century Class Trucks Workshop Manual, or 83.04, Subject 210
of the Columbia Workshop Manual.
4. Mark the wires as needed, then clip off the terminals at the switch end of the wires, leaving as much wire
length as possible.
5. Terminate wires 98, 98A, 98B, 98C, and 98D with Packard terminals (PAC 12015864 L).
6. Terminate wire P3 with a Packard terminal (PAC 12034046 L).
7. Install the newly terminated wires in a Packard connector (PAC 12110047) as listed in Table 1.
8. Plug the connector into the new switch (SPR 432 0012 000).
9. Install the original knob on the switch.
10. Install the new switch into the FCU and install the FCU in the dash.
11. Connect the batteries.
Packard Connector PAC12110047 Pinout
Switch Pin ID
Pinout

Connector Cavity

Circuit

A

98A

L

B

98B

M1

C

98C

M2

D

98D

H

E

98

B

F

P3

C

B
A

C

E
08/21/2012

D

F
f545935

Table 1, Packard Connector PAC12110047 Pinout

Freightliner Service Bulletin, October 2012

Page 1

83-147
Freightliner
Service Bulletin

Blower Switch Replacement, Pre-CDTC Century, Columbia
& Argosy
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

> Century Class Conventional
> Argosy COE
Cargo
> Columbia

Coronado
Business Class M2
Cascadia
108SD/114SD

Parts
Parts are available through the PDC. Refer to Table 2 for needed parts.

Description
Blower Switch
Connector
Packard Terminal
Packard Terminal

Required Parts
Part Number
SPR 432 0012 000
PAC 12110047
PAC 12015864 L
PAC 12034046 L

Quantity
1
1
5
1

Table 2, Required Parts

Warranty
This bulletin is informational only. Warranty does not apply.

Page 2

Freightliner Service Bulletin, October 2012