1980 Mazda B2000 BaseFACTORY OEM SERVICE PROCEDURE

Timer Test (GLC Only)

  1. To check timer (located under instrument panel on left side panel), connect wires to terminals "A", "B", and "C" of timer. See Fig 1. Connect a wire with a 30, 000 ohm resistor to terminal "D". Connect a wire with a 3.4 watt test lamp to terminal "E". Connect a voltmeter to terminal "D" and to negative battery terminal.
  2. Connect wires from terminals "A", "D", and "E" to battery positive terminal. Connect wire from terminal "C" to battery negative terminal. Voltmeter should show more than 6 volts.
    Fig 1: Schematic of GLC Dual Timing System and Voltmeter Hookup for Timer Test
    G09344961Courtesy of NOT AVAILABLE
  3. Then, connect wire from terminal "B" to battery positive terminal. Instantly, voltmeter should show less than 1 volt and test lamp should light. After approximately 105-135 seconds from showing 1 volt, voltmeter should indicate 8 volts. If not, replace timer.
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.