ECA 51 - Code 70 (Vacuum Switch)
- Check for loose connectors, corrosion or damage at vacuum switch and ECA terminal 2J. Repair as necessary.
- Apply vacuum to vacuum switch and test for continuity across switch terminals. See Fig 1
. If continuity does not exist, replace vacuum switch. Continuity should exist with as little as 2.36 in. Hg applied.
- Check for continuity between vacuum switch Black wire and ground. If continuity does not exist, repair ground circuit.
- Check for continuity between vacuum switch Blue/Black wire terminal and ECA terminal 2J. If continuity does not exist, check for open in wiring between vacuum switch and ECA. Repair as required. If symptom persists, go to ECA 55
.
- If continuity does exist, check for short in wiring between vacuum switch and ECA. If no problem is found in wiring, replace ECA.
Courtesy of FORD MOTOR CO.