4-3
TOPAZ
17. Insert the connector on the end of the
trailer wiring harness into the tow
vehicle electrical socket. Be sure it is
securely seated to minimize electrical
losses. Clean the terminals if required.
18. Perform an electrical system func-
tional:
a. Start tow vehicle engine.
b. Activate brake lights, turn signals
and running lights.
c. Correct any deficiencies before
travelling.
19. Remove the chocks from in front of
and behind each wheel.
20. Perform an emergency braking
system functional:
a. Disconnect electrical plug-in.
b. Trip the breakaway switch to
activate braking system.
c. Drive forward a little. All trailer
tires should skid. If they do not,
determine the cause of the prob-
lem before proceeding. Normally
the batteries need to be brought to
full charge.
d. Re-attach electrical connector to
truck.
21. Reverse the above procedure when
unhooking.
Fig. 4-3 HITCH
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