Test 10, Wiring Harness

1. Disconnect wiring harness connector from ignition module and check for dirt, corrosion, or damage. Push connector tabs to separate.
2. Disconnect wire from "S" terminal of starter relay.
3. Connect negative lead or volt-ohmmeter to distributor base.
4. Check battery voltage.
5. Check connector terminal voltage by connecting a volt-ohmmeter to small straight pin inserted into connector terminal. Check voltage with ignition switch in following positions:
a.. On models w/TFI-IV,check connector terminal 3 with ignition switch in RUN and START positions; and terminal 4 with switch in START position.
b. On models w/TFI-IV/CCD check connector terminal 3 with ignition switch in RUN and START positions.
6. If voltage readings are 90% of battery voltage, minimum, inspect wiring between coil and TFI module terminal 2 or any additional wiring or components connected to that circuit.
7. If voltage readings are less than 90% of battery voltage, check the following:
a. Check wiring harness and connectors for damage or shorts.
b. Check for damaged or worn ignition switch.