Low Voltage on fuel electrical

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Sep 25, 2021 | 01:12 PM

Krystal Ford

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Joined: Sep 2021

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Low Voltage on fuel electrical

Hi, I have a problem with my fuel pump not turning on. I have just returned from a vacation and gone to work for two day. The truck got me home, but when I went to start it the next morning, I could not get it to start. I checked and was not getting any fuel pressure. When I check the voltage at the distribution box relay, I am only getting 6.3 volts. And That is the same voltage I am getting at the cut off, and at the pump itself. Does anyone have the diagrams or could tell me where to look to trouble shoot the problem? I am not even sure the pump is bad at this point.

Sep 25, 2021 | 02:42 PM

projectSHO89

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From: St Louis

Quote:

When I check the voltage at the distribution box relay, I am only getting 6.3 volts.

Ignore it, it's a "red herring".

What is the voltage during the priming cycle? That cycle is only 2-3 seconds long after the key is turned from OFF to RUN and is the reading that actually matters.