FIRST, WHERE IS IT LOCATED? SECOND, HOW CAN IT BE TESTED TO SEE IF IT IS WORKING?

 

it's in your distributor. take the cap off and you'll see like 4 wires on it. looks like this:


HOW TO TEST IT:
1. Remove the distributor cap, the distributor rotor, and the inner cover.



2. Disconnect the BLACK/YELLOW, GREEN, YELLOW/GREEN, and BLUE wires from the ICM.
3. Turn the ignition switch ON. Check for voltage between the BLACK/YELLOW wire and chassis ground. There should be battery voltage.

* If there is no battery voltage, check the BLACK/YELLOW wire between the Ignition Coil and the ICM.
* If there is battery voltage, go to step 4.

4. Turn the ignition switch ON. Check for voltage between the GREEN wire and chassis ground. There should be battery voltage.

* If there is no battery voltage, check the:
* Ignition coil.
* GREEN wire between the ignition coil and the ICM.
* If there is battery voltage, go to step 5.

5. Check the YELLOW/GREEN wire between the PGM-IG ECM and the ICM.
6. Check the BLUE wire between the tachometer and the ICM.
7. If all tests are normal, replace the ICM.