Chevrolet 1980 Light Duty Truck Service Manual page 165

Fig. 2D-1 1 2 ~ W in do w and R egulator
W IN D O W REGULATOR - POWER
In the case that window will not operate, check
electrical connections first. Figure 2D-113 illustrates
location of junctions, switch, relay and circuit breaker.
Replacement
CAUTIO N: Electrical connectors must be
removed from w indow lift motor before
performing any
regulator, or personal injury could occur.
operation on the
Fig. 2D-1 13--Pow er W in d o w and Pow er Door Lock W irin g
1. Disconnect battery ground cable.
2. Remove door trim panel.
3. Disconnect harness from regulator.
4. Remove screws securing regulator to inner panel.
5. Push regulator out of door opening while holding
rear of assembly, then slide assembly to the notches in the
carrier channel and out through the door access hole.
CAUTIO N: Step 6 must be performed
w hen regulator is removed from door. The
regulator lift arms are under tension from
the counterbalance spring and can cause
serious injury if the motor is removed
w ith o u t locking
position.
6. Drill a hole through the regulator sector gear and
back plate. DO NOT drill hole closer than 1/2" (12.7mm)
to edge of sector gear or back plate. Install a pan head sheet
metal tapping screw (No. 10 - 12 x 3/4) in drilled hole to
lock sector gear in position.
7. Remove motor to regulator attaching screws.
8. Remove motor from regulator.
9. Prior to installation, lubricate the motor drive gear
and regulator sector teeth.
The lubrication used must be cold weather approved
to a minimum of minus 20° fahrenheit (-29°C).
10. Install regulator motor to regulator. Make sure the
motor pinion gear teeth mesh properly with the sector gear
teeth before installing the three motor attaching screws.
BODY 2D -45
the sector gear in
LIG H T T R U CK S ER V ICE M ANUAL