Test A: Step 9

9) Isolating Shorts In ECA  Turn key off and wait 10 seconds. With breakout box installed, connect ECA, but leave TFI or DIS disconnected. On 7.5L Truck, disconnect TFI and distributor Hall connector. Set DVOM on 200-k/ohm scale.

On SPOUT circuit, measure resistance between test pin No. 36 (SPOUT) and test pins No. 37 and 57 for short to power. Measure resistance between test pin No. 36 and test pins No. 40 and 60 for short to ground.

On PIP circuit, measure resistance between test pin No. 56 (PIP) and test pins No. 37 and 57 for short to power. Measure resistance between test pin No. 56 and test pins No. 40 and 60 for short to ground.

If any reading is less than 500 ohms, replace ECA and repeat QUICK TEST. If all readings are greater than 500 ohms, connect TFI and go to next step.