Test 4, Ballast Resistor

1. Disconnect and inspect module connector with red and white wires then, ignition coil connector.
2. Using a suitable ohmmeter, measure resistance between Batt. terminal of ignition coil connector and wiring harness connector wire that joins red wire in module connector.
3. On 1988 Models, if resistance is 0.8-1.6 ohms, problem is either intermittent or not in ignition system. If resistance is less than 0.8 ohms or greater than 1.6 ohms, replace ballast resistor.
4. On 1989-90 Models, if resistance is 0.8-1.6 ohms, replace ignition module. If resistance is less than 0.8 ohms or greater than 1.6 ohms, replace ballast resistor.