Question about 1986 Chevrolet Chevy

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How do i test for power to the fuel pump - 1986 Chevrolet Chevy

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1986 chevy has a manual pump mounted on the passenger side of the engine.

Posted on Oct 06, 2009

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3 Answers

No power to the fuel pump


Maybe this will help ---

Also check the fuel shut off switch since you do not have power.

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Jan 08, 2015 | 2002 Toyota ECHO

1 Answer

I have a 03 Hyundai accent I just replaced the fuel pump I have no power to the fuel pump I've checked the fuses and the fuel pump relay it won't start I'm not sure what to do next


Do you have a test light? If not, go buy a cheap $5 test light-one with a lead to clip to a ground, and with a needle type probe.
Pull the fuel pump relay out of the terminals it is plugged into-you need to check if the power feed for the pump is still available at the relay. Clip the test light lead to a ground and touch the test probe to the positive battery post-to check that your ground is good- tester should light up. Now touch the probe to all of the terminals that the relay plugs into. One terminal should have power with key off. If no terminals have power, you have lost the power feed for the pump. Double check all your maxi fuses in the power distribution box. Either a maxi fuse or a fusible link will be the power feed for the fuel pump relay.
If the power feed is there at the relay, try a new relay. If still no pump, a shop will probably have to check your fuel pump circuit.
Did you check for power at the fuel tank while the key was held in crank? When the engine is cranking, the fuel pump wire should have power. When the key is turned to on, the fuel pump should have power for about 2 seconds, to pressurize the fuel system. Then when key is turned to crank or start, the fuel pump should stay on.

Sep 07, 2013 | Cars & Trucks

1 Answer

Put in new fuel pump,fuses are OK,new fuel pump relay and still no power to the fuel pump


Get a test light and test the wires going to it ground one end and see if you have power at the pump. If not do the same at the fuses so where you are not geting the power.

Aug 19, 2012 | 1998 Pontiac Grand Prix

1 Answer

2000 mercury grand marquis 4.6 fuel


Voltage drop test the electrical circuit , do know how to do automotive electrical testing . Lose connection , resistance in the circuit , lose ground Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia Testing Electric Fuel Pump Problems with Voltage Drop Test

Feb 27, 2017 | 2000 Mercury Grand Marquis

1 Answer

2000 mercurt grand marquis


Not guessing as to what the problem is , testing for voltage drop problems with a volt meter . posted a video on youtube yesterday . If your still looking for guesses forget it , no one on here could say for sure without testing the circuit an hooking up a scan tool to see if PCM is energizing the relay . Do yourself a favor an take it to a qualified repair shop . Fuel Pump Electrical Circuits Description and Operation If you can't learn how to test from this guy , better take to a repair shop .

Mar 01, 2017 | Ford Cars & Trucks

3 Answers

Not getting fuel to the carburator. I have poured fuel on the carburator and it started, then it shut down. The fuel pump was replaced about 2 years ago..


check fuel pump relay on firewall passenger side if it has power and power when the key is turned on will click test power through relay to fuel pump disconnect connector at fuel tank make sure you have a good ground test for power at sending unit when key is os or in start if power the sending unit has rotten corroded wire going to fuel pump you will have to remove the fuel tank test power right at the pump if there is no power replace sending unit if power a pump use teslight one end on ground terminal and other lead on power terminal at pump if you have power replace the pump

if this is helpful plz leave a comment like and if you need more help ask once you eliminate pump good luck

Jan 16, 2011 | 1997 GMC Sierra

1 Answer

Fuel pump trouble shoot


You can use a voltmeter and test the power to the fuel pump. You can test power to the fuel pump relay as well. You can test the fuel pump relay with an ohmmeter on the RX1 setting to see if it is good. Make sure to check your fuses as well. Another good test is a fuel pressure test.
When you first turn your car's acc. on without starting the car, you should hear the fuel pump prime itself up for about 5-10 seconds. You should be able to hear it pump.

Dec 28, 2010 | 2004 Chevrolet Impala

1 Answer

How do i change the fuel pump for a 1991 buick regal and how can i tell if it is the fuel pump


turn the key on without starting the engine and listen for the fuel pump to make its 2 or 3 second fuel prime,, you may have to listen carefully, if you dont hear it, check the fuel pump fuse 10 amp red fuse. If its ok check for power at the connector leading to the top of the fuel tank, with it unplugged test with a test light the harness side of the connector between the grey wire and ground for power, the test light should light up when you do the fuel pump prime test again, light will come on for 2 to 5 seconds, if it does replace the fuel pump in the fuel tank >>note if you can hear the pump in the first test, pressure should be around 35 psi .

Nov 24, 2009 | 1991 Buick Regal

2 Answers

Wire diagram and color code for fuel pump 2002 misubisji galant


buy a cheap test light/probe and use that at the fuel pump plug to check for power in that circuit.It could also be a relay thats at fault so check that for power in and power out,same test tool.There are not many wires at the pump plug but as long as only one has 12v its not a power supply problem.Does the car run at all?

Oct 19, 2008 | 2002 Mitsubishi Lancer

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