Chrysler Conquest 1988 Service Manual page 583

ETACS
- Checking Circuit
8-335
30.
Horn Relay and Passing Control Relay Drive Circuit
y-- -To passing switch
Fuse
0
To battery c - V
-a-------
10A
1
I
DI
Diode
D2
.
Ff-I I L . I
Horn relay
Passing control
relay
-_
_--I
n
1
l-i n n m n
1 ( 2 1 3 14 1 5 16 1 - 18 1 - 1101 121122)23124(251- 127128
11~12~13~14~15~16~17~18~19~20~ m301311321331341 - 1 -
(ECU connector terminals)
A-a
B-a R GB Gw
m
(Front harness
side)
(Front harness
side)
16Y3620
NOTE
The check table shown below is based upon the assumption that the circuit indicated by the broken line (-- - -1
in the figure above is normal. [Refer to check chart No. 31. In addition, the headlights (high beam) should go
on when the passing switch is turned on with ignition switch ACC or ON.]
Check method Judgement
Step Cause Remedy
Condition Check object
Normal Malfunction
1
ECU connec- A-a connector ov
Check the horn
tor: (front harness side)
Battery Damaged relay
voltage coil
relay. (Refer to
separation terminal voltage
P.8-228.)
(GW-Ground)
Damaged or Repair the harness.
$syeysected
2 ECU connec- B-a connector -- Battery ov Damaged diode
Replace the diode.
tor: (front harness side) voltage DI or D2
separation terminal voltage
(GB-Ground) Damaged or Repair the harness.
zFrre;tcted
3
ECU connec- ECU terminal
tor:
voltage
separation
(29-Ground)
ECU:
Electronic Control Unit
Battery
voltage
ov
Damaged or
disconnected
harness
Repair the harness.