LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test J - Fuel Pump Circuit >> Test J: Step 10
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test J: Step 10

10) Check For Shorts to Ground  Turn key off and wait 10 seconds. Leave breakout box installed and ECA disconnected. Disconnect fuel pump relay. With DVOM on 200-k/ohm scale, measure resistance between test pin No. 22 and test pins No. 40 and 60. If reading is less than 10 k/ohms, repair short in FUEL PUMP circuit. Repeat QUICK TEST. If reading is 10 k/ohms or more, go to next step.