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To perform this test, listen for the relays to click when the No. 1 and No. 2
terminals are successively grounded by means of a clip lead. If no click is
heard, the relay is defective and should be replaced.
If the relays click, check for voltage at the No.
3 and No. 4 terminals while No. 1 and No. 2
are grounded. If voltage is not found at both
terminals, the relay is defective.
If voltage is present at terminals 3 and 4,
remove the clip leads from ¹ and 2. Operate
the control switch, and if the seat still does
not operate, it indicates that the relay may
not be properly grounded.
To make this check, disconnect the wires
from the relay to the motor and use a dwell
meter to check ground continuity. If 100 per
cent continuity is indicated, the trouble must
be in the motor.
Seat Fails to Operate Vertically
To find and remedy this trouble, apply the same procedures to the switch,
relay and motor serving the vertical adjuster as those described above
and on the opposite page under the heading "Seat Fails to Operate
Connect the motor wires to the relay, and
place an ammeter in series with the motor
ground wire. Then operate the seat control
switch and observe the current draw, which
should be approximately 15 to 20 amperes at
6 volts. If the reading is too low, the
probable cause is dirty or worn brushes.
Clean or replace as needed.
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