Control Module & Stator Check
- Refer to step 1) of Coil Primary Circuit Check. If modified plug sparked, but engine would not run, substitute a known good distributor (ground but do not install). Spin gear and check for sparks. See Fig. 7.
Courtesy of FORD MOTOR CO.
- If sparks occur, reconnect original distributor to check if it is damaged. Repeat tests to check for sparks. If none, replace distributor stator assembly.
- If no sparks occurred when gear of good distributor was spun, disconnect 3-wire distributor connector and 4-wire control module connector. Check harness wires in the following manner.
- Turn ignition switch "OFF". Connect ohmmeter leads to ends of each wire, one at a time. Wire mating with control module black wire (terminal 8) grounds the distributor. Wires mating with control module orange wire (terminal 3) and purple wire (terminal 7) signal control module as to when coil primary circuit should be shut off and on. Continuity should exist in each case.
- Then connect ohmmeter leads to harness wires mating with orange and purple wires of control module. There should be no continuity between these two wires.
- Then connect one ohmmeter lead to ground and touch other lead in turn to wires mating orange and purple control module wires. An open condition should exist.
- If harness checks are OK, reconnect distributor connector and substitute a known good control module and repeat system tests. If sparks occur, reconnect original control module and recheck. If no sparks now, replace control module.
- If harness proved defective in step 4) through step 6), repair wires or connectors as necessary and retest for spark at modified plug.