SkyTrak 8042 Service Manual - Manual (Page 619)

Electrical System
9.28 Model 8042, 10042, 10054 Legacy Rev. 10/03
7. To test the operation of the relays, connect a 12-volt
DC positive lead to the positive terminal (1). Connect
the negative lead to the mounting bracket or
negative post (2), listening for a “click” sound as the
contacts close. Replace the relay if the contacts do
not close.
8. When reassembling the relays to the mounting
bracket, torque the relay mounting hardware (3) to
5 - 9 lb-ft (7 - 12,5 Nm).
9. When reassembling the wires to the relay, torque the
terminal nuts (4) to a maximum of 95 lb-in (11 Nm).
Torque the other terminal nuts (5), to a maximum of
40 lb-in (4,5 Nm).
10. If the vehicle has one battery, connect the
negative (-) battery cable to the negative (-) battery
terminal (6).
If the vehicle has dual batteries, connect both
negative battery cables to both negative (-) battery
terminals (7).
Testing Diodes
To test diodes in the electrical system, set the DMM dial
on R x1 setting and connect one lead to each side (9) of
the diode. Note the reading on the DMM. Reverse the
leads and note reading. The DMM should indicate a high
or infinite resistance (no meter movement) when
connected one way and a low reading when connected to
the other. If both readings are high or infinite, the diode is
open. If both readings are low, the diode is shorted.
Repeat test on remaining diodes. If any diodes are
shorted or open, replace the diode board (10). Note the
orientation of the board when removing it for
replacement. Replace diode board in the same
orientation as it was when it was removed.
MH4940
1 2
3
4
5
MH4890
6
7
8
9
MU6020
10