Chrysler RAM TRUCK 2500 1994 Service Manual page 446

•
HORNS 8G ~ 1
H O R N S
C O N T E N T S
page page
GENERAL INFORMATION . 1 TEST PROCEDURES 1
SERVICE PROCEDURES 2
G E N E R A L INFORMATION
The horn system consists of a horn switch, horn re- (PDC) and grounded i n the horn switch. When the
lay (located i n the power distribution center), horns, horn switch on the steering column is pressed, the
and all their wiring and connections. The circuit volt- ground circuit is completed, energizing the relay, and
age is supplied from the power distribution center supplying power to the horns.
T E S T P R O C E D U R E S
HORNS WILL NOT SOUND
I f the horns do not sound, check for a blown horn
fuse i n cavity B of the PDC. I f the fuse is blown, re­
place i t with the same type fuse.
HORN R E L A Y
(1) Remove horn relay from PDC.
(2) Check for battery voltage at relay cavities 86 and 87.
If OK, go to next step. I f not, repair open circuit to PDC.
(3) Depress horn switch. Measure resistance be­
tween relay cavity 85 and ground. Meter should read
zero ohms. I f not, repair open to horn switch ground.
(4) Measure resistance between relay cavity 30 and
ground. Meter should read almost zero ohms (horn
r
A7
A7
F U S E !
(20
AMP)
(IN PDC)
HORN
RELAY
i ( I N PDC)
TO HORN
SWITCH
TO
A / C CLUTCH
RELAY
AO
i
FUSEJM
(50
AMP)
(INPDC)
T O
HORNS
FBSY
HORN
RELAY CONNECTOR
BATTERY
resistance). I f OK, replace relay. I f not, repair open i n
circuit between relay and horn.
HORN
• Measure the resistance between the horn connector
pin with black wire and chassis ground. The meter
should read zero ohms. I f not, repair open to ground.
• Disconnect horn connector. Depress horn switch.
There should be battery voltage at the horn connec­
tor pin with dark green with red tracer wire. I f OK,
replace horn assembly. I f not, repair open to relay.
HORNS SOUND CONTINUOUSLY
CAUTION: Continuous sounding of horns may
c a u s e relay to fail.
HI NOTE
HORN
HORN*
SWITCH
CLOCK SPRING
I N COLUMN
= STEERING
COLUMN
GROUND
X2-DG/RD
- Z l B K - i
X2 DG/RD
— Z l
BK
LONOTE
HORN
Z l
1
• FRAME
GROUND
J948G-7