Temp/Press Warning Lamp Circuit; Speedometer; Coolant Level Indicator - Pontiac TRANS AM 1977 Service Manual

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CHASSIS ELECTRICAL
8-5 1
,-
(CZ WITH V-6)
r-----
' I
I
(T)
Q
12 PNK--EY
I
-
- - - - A
ION
j
i
12 PPL--DY
1 2 B L U D K - D Z -
OIL CONNECTOR
.
PRESSURE
SWITCH
-
-
. L
BULKHEAD
CONNECTOR
TEMP/PRESS
2 0 G R N D K
I I
-
TELLTALE
m
-
4 J
: : : : E D
b
ENGINE TEMP.
SWITCH
20 TAN
- - . - - . I
BODY
*DIODE IS MOUNTED I N
?
FUEL
KEYMINDER BUZZER, LOCATED
GAUGE
ABOVE LEFT KICKPAD
-
HOWEVER, CIRCUITS ARE NOT
RELATED.
BODY
CONNECTOR
(FRONT OF REAR
COMPARTMENT)
18 TAN
SENDER
18 BLU DK
Y
REAR
FUEL TANK
COMPARTMENT
CONNECTOR
4480
Fig.
8-76A
Temp/Press
Warning Lamp Circuit
SPEEDOMETER
The speedometer incorporates a speed indicating
mechanism and an odometer to record total mileage. A
flexible cable, which enters the speedometer driven gear in
the transmission on one end and the speedometer head at the
other, rotates both mechanisms whenever the transmission
main shaft, propeller shaft and wheels rotate. For cruise
control equipped cars, there are two cables: one from the
transmission to the cruise control regulator, and the other
from the regulator to the speedometer head.
The odometer is driven by a series of gears from a worm
gear cut on the magnet shaft. The odometer discs are so
geared that as any one disc finishes a complete revolution,
the next disc to left is turned one-tenth of a revolution.
COOLANT LEVEL INDICATOR
All H,
HM
and X Series with L-4 engines are equipped
with a low coolant level indicator. The system is comprised
of an instrument panel warning lamp, module and coolant
lever sensor located in the right hand radiator core tank.
Wiring is incorporated in the Front End and Instrument
Panel Harness assemblies.

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Firebird 1977

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