Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Chart A-5, Cranks But Won't Run: Notes
With ignition on, ECM activates fuel pump relay and operates fuel pump. Fuel pump operates as long as engine is running or cranking, and ECM is receiving ignition reference pulses. If no ignition reference pulses are received, ECM will turn off fuel pump within 2 seconds after ignition is turned on. The ECM is located under left side of instrument panel, left of steering column, and contains 24-pin and 32-pin connectors.
- This checks for battery voltage at fuel pump relay.
- This checks fuel pump wiring circuit.
- This determines if ECM is supplying voltage to fuel pump relay.
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.
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.
No obligation. See pricing before you book.