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I. Fan #1 relay wire (green) and fan #2 relay wire (blue) are relay ground wires activated by the
computer. The factory cooling fan settings are listed below.
Note: Fan #1 will come ON at 226°f and go OFF at 217°f.
Fan #2 will come ON at 235°f and go OFF at 226°f.
J. The wire labeled TACH (white) is the signal wire for a tachometer if used. A tachometer filter
might need to be purchased depending on the brand of tachometer used.
K. The VSS output wire (green/white) sends out a signal to operate a speedometer.
L. The wire labeled SKIP SHIFT LIGHT (white/black) is only used with the T56 manual
transmission. The computer grounds this wire to turn on the skip shift light if used.
M. Cruise Control:
There are four cruise control wires in this harness. Most late model GM steering
columns years 1983-1993 already have or can be retrofitted with a cruise control switch. See
Figure 6.6 for the proper connection of these wires to a factory GM cruise control switch part
number 25111262. This harness kit does not include the connector needed because it has been
discontinued by Delphi. The Pink wire is power (connector pin A). The Gray wire is the cruise
control on switch signal (connector pin B). The Blu/Wht wire is the cruise control set/coast switch
signal (connector pin D). The Gry/Blk wire is the cruise control resume/accel switch signal
(connector pin C).
N. Connect the TAC Module Pigtail to the TAC Module and the Accelerator Pedal.
6.2.2 Dash Section Connections
WIRE COLOR: # OF WIRES: LABELED: CONNECT TO:
Grn, Blk, Blk/Wht, Orn 4 DLC ---------------
Gray, Grn/Wht, Black, Orange 4 Fuel Relay Fuel Pump Relay
Green/White 1 VSS Output Speedometer
White 1 Tach Tachometer
Orange/Black, Black/White 2 Gear Indicator Gear Indicator Switch
Pink, Purple, Lt.Blu 3 Brake Switch Brake Switch
Pink 1 Fuse Block Ignition Ignition Power
Green 1 Fan #1 Relay Coolant Fan #1 Relay
Blue 1 Fan #2 Relay Coolant Fan #2 Relay
White/Black 1 Skip Shift Light Skip Shift Light
Gry, Pnk 2 Clutch Pedal Pos. CPP Switch
Pnk, Blu/Wht, Gry/Blk, Gry 4 Cruise Control Cruise Switch
Table 6.1 Dash Section
FIGURE 6.6 Cruise Control
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