International — Diagnostic check list for IH electronic ignition system (Holley Model 1530 w/Remote Ignition Control)
Testing & diagnosis
From a International owner's manual covering: C-152, C-196, C-304, C-345, C-392, C-446, C-537, C-605. Check it applies to your exact model before use.
Applies to: International C 549 engine
Before you start
- Do not use a test lamp to check continuity of the distributor sensor unit
- Do not connect distributor sensor or tester switch SE-2503 to a 12 volt circuit
- Mark or tag wires to assure correct reconnection
- Only ignition coil IH part number 191 455 R91 should be used with IH electronic ignition
Procedure
- Inspect wiring: sensor connectors, ignition primary circuit, dash panel terminals, secondary cables, routing, and control (module) mounting bolts.
- Test battery voltage; record (spec 12-13V).
- Test primary voltage between coil positive terminal and ground; turn ignition ON and record (spec 12-13V).
- Test spark at plug: hold cable terminal about 1/2 inch from engine and crank.
- Test spark at distributor cap center terminal using jumper wire.
- Test sensor: disconnect distributor from harness, plug in tester switch, turn ignition ON, press tab and observe spark.
- Test sensor wiring circuit through ignition control (module).
- Test ignition control and coil; coil negative terminal voltage spec 5-8V, switched voltage spec 12-13V.
- Retest spark at plug after replacement of components; disconnect test equipment.
- Check dwell; record (spec 26-32); adjust if necessary.
- Check timing at idle speed with distributor vacuum hose disconnected and plugged.
Tools required
- DC Voltmeter Amazon
- Jumper wire 12-18 inches long with clip at each end Amazon
- Tester Switch SE-2503 Amazon
- Insulated pliers for handling high tension cable Amazon
- Dwell meter Amazon
- Timing light Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Battery voltage: 12-13V
- Primary voltage: 12-13V
- Coil negative voltage: 5-8V
- Switched voltage: 12-13V
- Dwell: 26-32 FridayParts $25.60
Source: International owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.