 Fuel pump stopped working a couple of days ago, could it be the relay board |
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| JimN73 |
 Sep 24 2017, 11:50 AM
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Senior Member  Group: Members Posts: 535 Joined: 6-October 07 From: Gig Harbor Member No.: 8,192 Region Association: Pacific Northwest  |
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. |
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| euro911 |
Oct 6 2017, 08:08 PM
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,937 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California 
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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. |
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| JimN73 |
Oct 7 2017, 10:57 AM
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#3
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Senior Member Group: Members Posts: 535 Joined: 6-October 07 From: Gig Harbor Member No.: 8,192 Region Association: Pacific Northwest |
QUOTE(euro911 @ Oct 6 2017, 07:08 PM)  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. |
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Posts in this topic
JimN73 Fuel pump stopped working a couple of days ago Sep 24 2017, 11:50 AM
JimN73 and:
3.5 psi pump for carbs, and
the relays are ... Sep 24 2017, 12:35 PM
Dave_Darling
and:
3.5 psi pump for carbs, and
the relays are... Sep 24 2017, 03:00 PM JimN73
and:
3.5 psi pump for carbs, and
the relays ar... Sep 24 2017, 03:32 PM Elliot Cannon Mine stopped working about a month ago. I tapped ... Sep 24 2017, 01:49 PM JimN73
Mine stopped working about a month ago. I tapped... Sep 24 2017, 02:25 PM JimN73 After cleaning some corrosion around pin13 and 14,... Sep 29 2017, 07:24 PM Spoke Power to the fuel pump relay is provided by the po... Sep 30 2017, 09:37 PM euro911 When you turn the key to the 'on' position... Oct 1 2017, 12:55 AM Olympic 914 try this troubleshooting sequence. it worked for m... Oct 1 2017, 09:45 AM cary Here's what I finally did on Matt's car. H... Oct 1 2017, 09:51 AM JimN73 Thanks, all. More troubleshooting and maybe some ... Oct 1 2017, 05:10 PM JimN73 Well, here is the final answer - I think.
Thanks ... Oct 6 2017, 01:22 PM euro911
You can probe the wire outbound of the connector... Oct 7 2017, 01:26 PM injunmort here is a simple test, fast, effective and isolate... Oct 7 2017, 11:23 AM Spoke I'm a bit confused on what you have found so f... Oct 7 2017, 11:43 AM euro911 ... As an aside, I've found when working in th... Oct 7 2017, 01:16 PM JimN73 Here's what I have done. I think I covered eve... Oct 9 2017, 10:04 AM |
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