Pick-Up Coil
NOTE:
Activation of the vacuum advance may align trigger wheel tooth and pick-up coil pole piece causing ohmmeter pointer to deflect. This deflection should not be diagnosed as a faulty pick-up coil.
- Isolate 2 pick-up coil lead wires. Remove pick-up coil connector from module. Connect ohmmeter to either terminal and ground. See Fig 1 . Connect pump and apply vacuum to test to vacuum advance unit. Replace vacuum advance unit if inoperative.
- Attach ohmmeter to either pick-up coil terminal and the distributor housing. Select mid scale. Operate vacuum pump and observe ohmmeter throughout vacuum range. Reading should be infinite at all times. If not, replace pick-up coil. See meter "A" in Fig. Fig 1 .
- Attach ohmmeter to both pick-up coil connector terminals. Operate vacuum pump and observe ohmmeter throughout the vacuum range. Replace coil if reading is not infinite at all times. See meter "A" in Fig. Fig 1 .
- Connect ohmmeter to pick-up-coil terminals. Operate vacuum pump and observe ohmmeter throughout the vacuum range. Flex terminal wires by hand to check for possible intermittent defects in wiring or connectors. Replace pick-up coil if resistance is not 500-1500 ohms at all times.