Transcript Trailer/Pick-up Wiring

Trailer/Pick-up Wiring
Ag Mechanics
Mr. Ormiston
Job: Trailer/pick-up wiring
Enterprise: Ag Mech
Problems:
1. How does the brake control in the pick-up
work?
2. What does the variable resistor do?
3. How do you adjust braking power?
4. What do the following abbreviations mean:
A.
B.
C.
D.
E.
F.
RT
LT
GR
BR
S
TM
Problems:
5. What color of wire should be used for each
function?
A. Right turn
B. Left turn
C. Tail marker
D. Ground
E. Brakes
F. Service
6. Do we need separate wires for tail markers,
license plate and clearance lights?
Solutions:
1. How does the brake control in the pickup work?
A. By electricity.
B. The brake petal is pressed and electricity is sent to the pendulum in the
trailer brake assembly.
C. The pendulum is a magnet and the electricity charges the magnet.
D. The pendulum is attracted to the brake drum pressing the shoe against
the drum.
2. What does the variable resistor
do?
• It is part of the brake control that acts as a
regulator
• allows only certain current to pass through
• The harder the brake pedal is pressed the
more current is allowed through
(increasing braking power)
3. How do you adjust braking
power?
• On the side of the brake control there is usually
one knob.
• One should adjust this knob for the load on the
trailer, meaning increasing power for heavier
loads or decreasing power for lighter loads.
• Most people adjust the brake control one time
for their “common loads”
4. What do the following
abbreviations mean:
•
•
•
•
•
•
RT- Right Turn
LT- Left Turn
GR- Ground
BR or S- Brakes
TM- Tail Marker
A- Middle prong- Service, hot wire. Used for
Beak away or lights that need to be used in the
trailer when vehicle is off.
5. What color of wire should be
used for each function?
•
•
•
•
•
•
A.
B.
C.
D.
E.
F.
Right turn- Green
Left turn- Yellow
Tail marker- Brown
Ground- White
Brakes- Blue
Service- Black
6. Do we need separate wires for
tail markers, license plate and
clearance lights?
• No, all of these functions are the same
Trailer Plug ID
Directions: What Color of wire should be used for each of the following functions.
1.________________________________
2.________________________________
3.________________________________
4.________________________________
5.________________________________
6.________________________________