 Fuel Pump wiring, I am looking for a diagram that shows pin 3 on Fuel Pump Control |
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| Fishey |
 Jul 16 2018, 12:33 PM
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#1
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Newbie  Group: Members Posts: 2 Joined: 16-July 18 From: Ohio Member No.: 22,318 Region Association: None  |
I have a 1973 1.7 that I am currently working on at my shop.
The fuel pump relay gets ground from pin 3 (white wire lower left of board 4 pin connector) It does this great for 1.5 seconds to power the fuel pump relay and activates the fuel pump. However, when cranking pin 3 does not deliver ground and I am sure my problem is on what provides the ground to pin 3 but for the life of me I cannot find a diagram. Anyone have a diagram or helpful information? Thanks -Ronald Swift |
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| JeffBowlsby |
Jul 16 2018, 01:31 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,476 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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If I understand your situation, the ECU controls the ground. You might also test/clean your FP relay on the relay board, test/clean the FI harness grounds at the back of the engine and test/clean the relay board grounds under the relay board to the sidewall.
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| Fishey |
Jul 16 2018, 02:48 PM
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#3
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Newbie Group: Members Posts: 2 Joined: 16-July 18 From: Ohio Member No.: 22,318 Region Association: None |
Fixed, My problem was the Distributor sensor was not making good contact inside and wasn't sending the signal needed for the ECU to provide ground.
The car runs like a top again! |
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