GRECH MOTORS
70
Basic Troubleshooting Guide
The following section details basic troubleshooting techniques that will help you to understand and determine
the best course of action regarding some commonly encountered problems.
VIBRATION: Noises or Vibration
at high speeds only, or in a certain
range of speeds:
A certain range of speeds indicates a damaged or otherwise out-of-
balance drive line, Contact the Service Dept. Only SELECT drive line
shops that are qualified to properly balance the multiple drive line
extensions used in your bus. GRECH MOTORS can recommend one
near you.
REAR A/C BLOWER INOPERATIVE Check to make sure all fuses are good. If the rear A/C is still not work-
ing, call the Service Department at GRECH MOTORS.
EXTERIOR LIGHTING
One or all exterior clearance lights inoperative, please refer to the
FORD owner’s manual for fuse locations.
PAGING SYSTEM INOPERATIVE
Check the 5 amp fuse on the circuit board behind the driver. Wiring
schematics and instructions for the paging system are located in this
manual on page 22.
EXTERIOR SEALANTS CRACKING
OR LIFTING
If the exterior seams of the bus ever crack or start lifting, simply clean
the area with rubbing alcohol or mineral spirits completely. After this
has been done you can remove the old silicone by using a sharp knife
or razor cutter. Clean the area again with the above cleaners and apply
a thin bead of exterior silicone and smooth the bead with your finger for
a smooth appearance.
PROBLEM
POSSIBLE
SOLUTIONS
