Micro 70 Wire Guidance
PS
S8.0
8200
F-code
Section
C-code
Version no
T-code
001
OE35
© BT Products
313
Service Manual
1997-10-24
10. Troubleshooting Charts
1. Alarm sounds and parking brake remains set when truck
is turned on; manual/auto switch seems to have no
function.
The following tests are to be made with the truck power
on and the Micro 70 system in the auto mode.
a. Check for 24 volts at Micro 70 connector K6-2. If not
24 volts, recheck operating symptoms and go to the
proper chart.
b. Check for 24 volts at wire 76 connected to back of
auto/manual switch. If not 24 volts, repair open wire
76 between Micro 70 controller and auto/manual
switch.
c. Check for zero volts at wire 13 connected to back of
auto/manual switch. If not zero volts, repair open
wire 13 between auto/manual switch and truck wiring
harness.
d. Replace auto/manual switch.
2. Alarm sounds and parking brake is set in all modes of
operation; auto and manual lights turn on in turn each
time the auto/manual button is pushed.
Tests are to be made with Micro 70 system in manual
mode.
a. Check for battery volts on wire 2 at fuse holder of
fuse 1, 1 amp control fuse. If not battery volts, repair
open wire 2 to fuse holder.
b. Check for battery volts on wire 94 at fuse holder of
fuse 1, 1 amp control fuse. If not battery volts,
replace fuse 2.
c. Check for battery volts at wire 94 connected to
emergency disconnect contactor interlock switch. If
not battery volts, repair open wire 94 between fuse 1
and emergency
disconnect contactor interlock
switch.
d. Check for battery volts at wire 96 connected to
emergency disconnect contactor interlock switch. If
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