Troubleshooting - Strong GR4 Procedures Manual

Problem: Hydraulic brakes on trailer do not work.
Probable Cause
Master cylinder of trailer hitch
low brake fluid.
Brakes worn.
Problem: Electric brakes on trailer do not work.
Probable Cause
Bad electrical connections.
Problem: Prongs are not making contact.
- Spread prongs with small screwdriver to clean.
Problem: Wires are not making contact.
- Tighten screws that make contact with wire.
Trouble Shooting
Brakes
How to Determine
Remove top from master
cylinder and visually inspect
fluid level.
Excessive travel on master
cylinder.
How to Determine
Check voltage at electrical plug
on rear of truck with test light or
volt meter while moving brake
actuator lever on truck, also
determine if current is present.
21
Solution
Refill with quality brake fluid &
Properly bleed air as with any
brake system. Inspect & correct
any leaks. Adjust brakes until
small drag if felt on wheel.
Solution