GMC 4000 Series Service Manual page 544

If directional tell-tale on instrument panel
does not flash in either direction, check for the
following:
1. Burned out fuse on fuse block.
2. Defective flasher or flasher terminals not
properly engaged in junction block.
3. Directional tell-ta le bulb on instrument
panel burned out.
4. Short or open circuit. Check indicator lamp
HORN RELAY
M o d e l..
Voltage.
HORN RELAY
M a k e ................................................................................................. Delco-Remy
M odel....................................................................................................... 1115824
A ir Gap at Core
Points Closed ( I n . ) . ............................................................................... 0.020
Point Opening ( I n . ) ................................................................................... 0.018
Closing Voltage (R a n g e )........................................................................ 1.5-9.5
TRAILER I.C.C. MARKER
LAMP RELAY
M a k e ..............................................................................................Delco-Remy
M odel....................................................................................................1115841
A ir Gap at Core Points Closed ( I n .) * ..................................... 0.012 (M in .)
Point Opening ( I n . ) ..................................................................... 0.015-0.025
Closing Voltage (R a n g e )............................................................................ 7-8
Sealing V o ltag e............................................................................... 10 (M a x.)
10%
*Toleran ce Plus or Minus
G M C S E R V I C E M A N U A L
SPECIFICATIONS
.2480982
........12
LIGHT BULB DATA
Headlamp
Conventional Cab and " S " Models
Inside Light (Typ e 1 )...................... 4001 (L ) *
Outside Light (Typ e 2 ) ...................
" P " M odels . ..........................................
T ilt Cab M odels . ...................................
Stop and T a illig h t . ...................................
Parking Lights (W hen U se d )..................
Front M arker L ig h ts . ...............................
Instrum ent and T ell-T a le Lights
Except T ilt Cab M odels.......................
T ilt Cab M odels . ...................................
Directional S ig n a ls ...................................
Dome L ig h t................................................
Voltm eter T e ll-T a le Light (When Used)
Am m eter T ell-T a le Light (When Used).
License Plate L ig h t ..................................
Back-up L ig h t . ..........................................
T urn Signal L ig h t.....................................
*Long Life Unit.
CHASSIS ELECTRICAL A N D INSTRUMENTS
circuit referring to "Wiring Diagram" in applic­
able "Wiring Diagrams" booklet.
5. Defective directional control switch a s­
sembly.
If directional tell-tale light does not cancel
after completing a turn, remove the steering wheel
as explained in "MECHANICAL STEERING" (SEC.
9A) and check for a worn or damaged cancelling
cam.
L O W A IR P R E SSU R E & L O W V A C U U M A L A R M B U Z Z E R
M a k e ............................................................................................. Delco-Remy
M odel................................................................................................... 1116882
Point Opening ( I n .) .................................................................................. .017
Closing Voltage................................................................. A d just to Buzz at
E N G IN E A L A R M B U Z Z E R
M a k e ............................................................................................. Delco-Remy
M odel................................................................................................... 1116914
Point Opening ( I n .) .................................................................................... 015
Closing Voltage................................................................. A d ju st to Buzz at
FL A SH E R U NIT
S P E C IF IC LO AD—2-PRO N G............................................... SIG . S T A T 144
V A R IA B L E LO AD—2-PRO N G .............................................. S IG -S T A T 175
V A R IA B L E LO AD—3-PRO N G .............................................. S IG -S T A T 180
C A N D L E -
B U L B
NO. P O W E R
37^2
Watts
4002 (L ) * 371 /2-55 W atts
6012 ( L ) * 45-50 W atts
6013 ( L ) * 45-50 Watts
1157 32-4
67 4
1155 4
2
57
161 1
1156 32
211 12
2
57
2
57
67 4
32
1156
1156 M . 32
Sec. 12
Page 533
.25-.35 Am peres at 13.5-14.5 Volts
.30-.35 Am peres at 13.5-14.5 Volts