2001 Ford Explorer ChassisFACTORY OEM SERVICE PROCEDURE

Test B: Generic Electronic Module/Central Timer Module Does Not Respond To NGS Tester

  1. Turn ignition switch to LOCK position. Disconnect Generic Electronic Module/Central Timer Module (GEM/CTM) 26-pin harness connector C280. Inspect connector for physical damage, bent terminals or corrosion. If connector is okay, go to next step. If connector is damaged, repair connector as necessary and recheck system operation.
  2. Measure resistance of Light Blue/White wire between GEM/CTM harness connector C280 terminal No. 25 and Data Link Connector (DLC) terminal No. 7. See Figure and Fig 1 . If resistance is less than 5 ohms, replace GEM/CTM and recheck system operation. If resistance is 5 ohms or more, repair open in Light Blue/White wire between GEM/CTM and DLC. Recheck system operation.
Fig 1: Identifying Generic Electronic Module/Central Timer Module Harness Connector C280 & Remote Anti-Theft Personality Module Harness Connector C336 Terminals
G97A28803Courtesy of FORD MOTOR CO.
Factory Service Tools

Use the Manual With the Right Hardware

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

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote 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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.