6-11
6-11
THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
THDC / THDCP - 954 / 955 / 974 (Rev. 06/03)
C
Co
om
mp
po
on
ne
en
nt
t
P
Prro
ob
blle
em
m
C
Co
orrrre
ec
cttiio
on
n
4.
4. Igni
Ignition
tion Swi
Switch
tch
continued
continued
1.
1. Igni
Ignition sw
tion switc
itch (S1) does no
h (S1) does not clos
t close
e
(accessory position).
(accessory position).
2.
2. Igni
Ignition sw
tion switc
itch (S1) does no
h (S1) does not clos
t close
e
(start position).
(start position).
1.
1. On the ba
On the back of
ck of the ig
the igniti
nition sw
on switc
itch
h
(S1), at the B terminal, check for
(S1), at the B terminal, check for
12 VDC from circuit breaker
12 VDC from circuit breaker
(CB2).
(CB2). Ensure t
Ensure that the
hat the battery
battery
disconnect switch (S54,
disconnect switch (S54, Illust
Illustration
ration
1-6) i
1-6) is in the On posi
s in the On position
tion.
. If 12
If 12
VDC is not present, ensure that
VDC is not present, ensure that
circuit breaker (CB2) is set.
circuit breaker (CB2) is set.
Ensure that Deutsch connector
Ensure that Deutsch connector
(EC
(EC1) is not
1) is not loos
loose or
e or that pin 6
that pin 6 or
or
11 is backed out of this connector.
11 is backed out of this connector.
Ensure that all battery cables are
Ensure that all battery cables are
connected to the terminals of the
connected to the terminals of the
batteries
batteries.
. Ensure that
Ensure that the batter-
the batter-
ies are
ies are charged.
charged. Ensure that
Ensure that cir-
cir-
cuit breaker (CB1) can maintain a
cuit breaker (CB1) can maintain a
set st
set state.
ate. If 12 VDC i
If 12 VDC is pres
s present at
ent at
the B terminal, turn the key to the
the B terminal, turn the key to the
ignition position, at the I terminal,
ignition position, at the I terminal,
you should see 12 VDC; if not,
you should see 12 VDC; if not,
remove the wire from the I termi-
remove the wire from the I termi-
nal and rec
nal and recheck v
heck volta
oltage.
ge. If 12
If 12
VDC is now present, there is a
VDC is now present, there is a
short between the ignition switch
short between the ignition switch
(S1) and the truck power solenoid
(S1) and the truck power solenoid
(L1)
(L1); isola
; isolate and repair sho
te and repair short.
rt. If 12
If 12
VDC is not present and 12 VDC
VDC is not present and 12 VDC
was present at the B terminal,
was present at the B terminal,
replace the ignition switch (S1).
replace the ignition switch (S1).
2.
2. The tr
The truck i
uck is equip
s equipped wi
ped with an anti
th an anti--
restart ignition switch (S1).
restart ignition switch (S1).
Should the truck fail to start on the
Should the truck fail to start on the
first attempt, the key must be
first attempt, the key must be
turned fully off to reset the ignition
turned fully off to reset the ignition
switch, allowing the B (Battery)
switch, allowing the B (Battery)
and S (Start) contacts to close
and S (Start) contacts to close
when the ignition switch is turned
when the ignition switch is turned
to the Start pos
to the Start positi
ition.
on. Thi
This is a
s is a
momentary position that should
momentary position that should
only make contact when the key is
only make contact when the key is
full
fully turn
y turned.
ed. On the back of t
On the back of the
he
ignition switch (S1), ensure that 12
ignition switch (S1), ensure that 12
VDC is present at the B terminal.
VDC is present at the B terminal.
If 12 VDC is not present, ensure
If 12 VDC is not present, ensure
that circuit breaker (CB2) is set.
that circuit breaker (CB2) is set.
Ensure that Deutsch connector
Ensure that Deutsch connector
(EC
(EC1) is not
1) is not loos
loose or
e or that pin 7
that pin 7 is
is
backed out of this connector.
backed out of this connector.
Ensure that all battery cables are
Ensure that all battery cables are
(continued)
(continued)
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