Fuel pump stopped working a couple of days ago, could it be the relay board Options

[JimN73]

I have no power at the pump.

I have 12.4 volts at pin #13 on the relay board.

No power at pin #5 or 7, old eyes can't see the stripe colors very well.

Fuses are good.

Am I missing something?

Thanks in advance.

[euro911]

You can probe the wire outbound of the connector to verify if the wire is disconnected to pin #13 on the connector.

Note that you won't have constant power on the wire from pin #13. There's a timing circuit (I believe it's in the ECU) that shuts the pump off after several seconds unless the motor is running.

You can remove the cover on those 12 and 14-pin plugs if you need to check for a bad connection inside, and if you might need to re-solder any wires.

[JimN73]

You can probe the wire outbound of the connector to verify if the wire is disconnected to pin #13 on the connector.

Note that you won't have constant power on the wire from pin #13. There's a timing circuit (I believe it's in the ECU) that shuts the pump off after several seconds unless the motor is running.

You can remove the cover on those 12 and 14-pin plugs if you need to check for a bad connection inside, and if you might need to re-solder any wires.

Thanks, Mark. I have tried to 'slide' the cover on the connectors - doesn't want to go. And I'm afraid I'll trash the cover if I try to pry it off.

What would you suggest?

Power is not a problem, carbs with no ECU so there is constant power.

[euro911]

You can probe the wire outbound of the connector to verify if the wire is disconnected to pin #13 on the connector.

Note that you won't have constant power on the wire from pin #13. There's a timing circuit (I believe it's in the ECU) that shuts the pump off after several seconds unless the motor is running.

You can remove the cover on those 12 and 14-pin plugs if you need to check for a bad connection inside, and if you might need to re-solder any wires.

Thanks, Mark. I have tried to 'slide' the cover on the connectors - doesn't want to go. And I'm afraid I'll trash the cover if I try to pry it off.

What would you suggest?

Power is not a problem, carbs with no ECU so there is constant power.

I'd go along with 'Mort's' method first ... seems easy enough.

Since most wiring fatigue issues happen at connector plugs, I would remove the plug, place one probe on pin #13 and stick the other probe through the insulation of the wire going to the pump (a few inches away from the plug) and see if you have continuity there (you can seal up the hole with a dab of liquid tape).