TM 9-2320-209-10-3 CHAPTER 4 TEST EQUIPMENT PROCEDURES INDEX 4-1. INDEX. There is no test equipment needed at the operator maintenance level to do troubleshooting, so, no test equipment procedures index is given. CHAPTER 5 TROUBLESHOOTING ROADMAPS 5-1. GENERAL. This chapter gives troubleshooting roadmaps for every system of the truck for which you have detailed troubleshooting procedures. Figures 5-1 through 5-15 cover all the roadmaps for the detailed procedures. 5-2. ROADMAPS . Each roadmap gives a list of things which are most likely to cause a fault symptom in a system or subsystem. At least one of the items listed will be found to be bad when you do the detailed troubleshooting procedures for that system. 4-1/5-1