1990 Ford Festiva L Plus, AutomaticFACTORY OEM SERVICE PROCEDURE

Distributor Signal Test

  1. Disconnect wire from negative side of coil. Connect test light between positive battery terminal and disconnected wire. Crank engine and check for test light flash. If test light flashes, go to step 3). If test light does not flash, proceed to next step.
  2. Disconnect distributor 3-wire connector. Connect test light between positive battery terminal and connector ground terminal. Crank engine and check for test light. If test light does not come on, repair open circuit between distributor and ground. If light does come on, go to next step.
  3. Using DVOM, measure voltage between distributor Yellow/Black wire and ground, while cranking engine. If reading is 1.5 volts or less, replace crankshaft position sensor. If reading is more than 1.5 volts, go to SELF-DIAGNOSTICS article.
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.