Sealed Module Connector Distributor W/ Externally Mounted

Ignition Coil

1. Disconnect a spark plug wire and connect Spark Tester (ST-125). Check for spark while cranking engine. If no spark occurs, check for spark at any other wire. Intermittent sparks are considered no spark. If no spark occurs, proceed to step 2). If spark occurs, the problem is in fuel system or spark plugs.
2. Unplug 4-terminal EST connector. Check for spark at tester. If spark occurs, replace pick-up coil. If no spark occurs, check for spark at coil wire with Spark Tester (ST-125) while cranking engine.
   NOTE: Leave Spark Tester (ST-125) connected during remainder of tests.
3. If spark is present while cranking, inspect cap for cracks or other defects. If okay, replace rotor. If no spark while cranking, disconnect distributor 2-wire "C/+" (coil) connector. Turn ignition on and check voltage at "+" and "C" terminals of harness connector.
4. If less than 10 volts at terminal "C" only, check for open or ground in circuit from "C" to ignition coil. If both terminals read less than 10 volts, proceed to step 5). If both terminals read 10 volts or more, proceed to step 6). If circuit is good, fault is ignition coil or connections.
5. Repair wire from module "+" terminal to "B" terminal of Black ignition coil connector or primary circuit to ignition switch.
6. Check voltage from "TACH" lead to ground with ignition on. Reconnect distributor 2-wire connector.
7. If voltage less than 1 volt in step 6), repair open tachometer lead or connector and repeat step 6). If voltage reading is 1-10 volts in step 6), replace module and check for spark as described in step 1). If spark present, system is good. If no spark, replace ignition coil.
8. If voltage is more than 10 volts in step 6), connect test light from "TACH" lead to ground. Crank engine and observe light. If light blinks, replace ignition coil and recheck for spark with Spark Tester (ST-125). If still no spark, install original coil and replace module.
9. If light remains steady in step 8), unplug distributor 4-wire connector. With ignition on, remove distributor cap and retaining screw in 4-wire end of module.
10. Loosen remaining module screw and pivot module out to gain access to pick-up coil terminals. Connect jumper from module retaining screw eyelet to ground. Disconnect pick-up coil from module. Connect voltmeter between "TACH" terminal and ground. Insulate test light probe to 1/4" from tip. Note voltage as test light is momentarily connected between module terminal "P" and 12 volt source. DO NOT  allow test lamp to be connected for more than 5 seconds.
11. If no voltage drop, ensure module is properly grounded. If good ground is noted, replace module. If voltage drops, check for spark at coil wire with Spark Tester (ST-125) when test light is removed from module terminal.
12. If spark is present in step 11), check pick-up coil resistance or connections. If no spark in step 11), check module with Module Tester (J-26792). Replace module if defective. Otherwise, check coil wire between cap and coil. If wire good, replace coil.
13. If Module Tester (J-26792) was not available in step 12), replace ignition coil and repeat step 9). If spark is now present, system is good. If no spark present, original ignition coil was good. Reinstall original coil and check coil wire. If coil wire good, replace module.