GMC 4000 Series Service Manual page 535

Sec. 12
Page 524
CHASSIS ELECTRICAL AND INSTRUMENTS
o
16
LEFT CLUSTER
1 Turn Signal T ell-ta le
2 Oil Pressure Gauge
3 Hot Engine T ell-tale
4 Speedometer
5 Low Air Pressure T ell-tale
6 Air Pressure Gauge
Figure 1 0 - Rem oving Instrument Cluster
(Tilt Cab M odel) (Typical)
G M C S E R V I C E M A N U A L
7 Differential Lock T ell-tale
8 Hi Beam Indicator
9 Engine Temperature Gauge
10 Generator No-Charge T ell-tale
11 Tachometer
12 Low Oil Pressure T ell-tale
Figure 9 — Typical Instrument Cluster (Tilt Cab M odel)
a fuel gauge. A matching round speedometer is
also used on these models and an air pressure
gauge or vacuum gauge is mounted on the instru­
ment panel.
through blade type connectors. Instrument and te ll­
tale light bulbs are installed in sockets which snap
into holes in back of cluster.
rectly in front of driver, provide the necessary
instruments, gauges, and tell-tale lights for effic­
ient operation of the vehicle. Figure 9 illustrates
a typical set of instrument clusters, although the
instruments, gauges, and tell-tale lights may vary
due to different truck models, depending upon the
size of the vehicle and the equipment used.
multiple plug and receptacle type connectors. A
locating key on harness receptacle engages a slot
in cluster plug to assure correct installation.
ment lights, and electrical gauges are printed on
back of instrument case. Each printed circuit
R IG H T CLUSTER
13 Fuel Gauge
14 Turn Signal T ell-ta le
15 Cluster Retaining Clips
16 Instrument Lights
17 Wiring Connectors
Electrical connections to gauges are made
STEEL TILT CAB MODELS
One or two instrument clusters, mounted di­
Wiring harness connections are made through
Electrical circuits to tell-tale lights, instru-
T-3590-1