TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/PE 1
The HMMWV electrical system contains 15 components.
The seven rules of troubleshooting that should be employed when
troubleshooting the HMMWV are as follows:
- Rule 1. Question the operator to obtain any information that
might help you determine the cause of the malfunction.
- Rule 2. Never overlook the chance that the problems could be
of simple origin. The problem could be corrected with a minor
- Rule 3.
Use all senses to observe and locate troubles.
- Rule 4. Use test instruments and gages to help you determine
and isolate the problem.
- Rule 5.
Always isolate the system where the
occurs and then locate the defective components.
- Rule 6. Use standard automotive theories and principles when
troubleshooting the vehicle(s) and/or system(s) covered in
- Rule 7.
After completing the troubleshooting and making the
necessary corrections, verify that the malfunction has been
corrected and that no additional malfunctions.
The HMMWV uses a four-stroke, 6.2 liter, V8 diesel engine.
entry stack with raincap
air filter canister
air duct hose
air to manifold duct
air restriction gage