SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD1993PICKUP F250, 2D PICKUP, 5.0 N, STANDARD, M5OD-R2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 38 (ANTI-LOCK)TESTINGTEST C - YELLOW & RED LIGHTS ON STEADY
1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2

Test C - Yellow & Red Lights On Steady

1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2SECTION Test C - Yellow & Red Lights On Steady
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 1992 Ford Ranger, 1992 Ford RV Cutaway, 1992 Ford Pickup, 1992 Ford Explorer, and 1992 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check master cylinder fluid level. If fluid level is low, check for leaks, refill reservoir and retest system. If fluid level is okay, remove cap from master cylinder. Carefully push down on float in reservoir. If float does not move downward, replace master cylinder reservoir. Retest system. If float moves downward, reinstall master cylinder cap.
  2. Turn ignition on. Check parking brake and release if applied. If both lights go off, replace diode/resistor. See Figure -Figure . If both lights stay on, remove parking brake switch and diesel low vacuum switch (if equipped) connectors.
  3. If both lights go off, replace diode/resistor. If both lights stay on, attempt to retrieve trouble code. See RETRIEVING TROUBLE CODES  . If trouble code is retrieved, go to appropriate code. See RETRIEVING TROUBLE CODES  . If both lights are still on steady, turn ignition off.
  4. Unplug fluid level sensor connector, at master cylinder. Connect a jumper wire between the 2 Purple/Yellow and Purple/White wires. Turn ignition on. If both lights go off, replace master cylinder reservoir. If both lights stay on, turn ignition off.
  5. Unplug control module connector. Turn ignition on. If both lights go off, replace control module. If both lights stay on, check for short in fluid level and parking brake switch wiring. Repair short in wiring and retest system.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.