Fuel pump fuse location

Tiny
WRENCHTECH
  • MEMBER
Sure, it's possible but so are dozens of other things. You really need to do some testing during the failure to have any idea if you are on the right track or not.

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Thank for your time, I did all that, there is voltage on the distributor, spark plug, pgm relay and in the fuel pump plug. I even spray starting fluid on the intake and the car run for a second, but because there no fuel, it shut down. The starter cut relay has something to do?
I notice that during cranking the engine, all the dash board light star flashing even the security light, is that normal? Or the immobilizer is engaged?
There is voltage on the fuel pump plug, but I dont hear the fuel pump humming went I put the key on, but if I applie direct voltage to the pump(not the plug) work. QUESTION, the fuel pump uses less voltage? Dont know what to do, shoud I replace the fuel pump or not. Thanks
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
You need to test what is missing when it could nor start, fuel or ignition.

If it is fuel that is missing, the PGM-FI main relay can be the cause.
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+1
Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

Dash lights flashing means it is not normal.
1. Faulty ignition switch. Try applying remote power supply to BlackYellow wire at distributor and start.
2. ECU fault. Immo fault would not allow cranking.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Thank you so much for your excellent help.I will Apply power supply to BlackYellow wire at distributor to see, I let you know.

P.S. I will not forget you, I will make another donation, THANKS
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
JOE1978
  • MEMBER
  • 1987 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 112,000 MILES
Is there a differents in a fuel pump relay and a fuel pump cut-off relay
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

You are welcomed and thanks for the appreciation, it makes my day ;)

Anything else feel free to ask.

Have a nice day and hope you get the problem solved.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Fuel pump cut-off relays are similar to inertia switches, they have the ability to cut-off fuel supply in case of an impact. A fuel pump relay is just a simple on/off switch type relay, which is only activated by the vehicle's computer system.
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-2
Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Hi there, I applied direct + voltage to the BlackYellow wire at distributor and the dash board ights still flashing during cranking the engine and NO star and no noise from the fuel pump and blow the 50A fuse ander the hook. I did check(open) the ignition switch and look ok. I think may be is the fuel pump, if I spray starting fluid the engine star, and went I put the key ON there is voltage at the fuel pump plug but no noise.
So if not the fuel pump, do you think that is a ground problem? Or definely the ECU fault?Do I have to replace the ECU? Thanks
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

If you suspect the fuel pump to be faulty, try unplugging the connector and crank to see if the fuse blows and if the dash lights flickers. Repeat this with the PGM-FI main relay unplugged if it is not the fuel pump. You definitely do not have fuel but the problem is, is it the control that is faulty not supplying power to the fuelpump or is it the fuel pump that is faulty.

Seems there is a major shorting somewhere otherwise the 50 A fuse would not blow easily. It is possible for the ECM to be faulty but ECM seldom produces major shorts.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
I blow the 50A fuse went applying + remote power supply to BlackYellow wire at distributor and jumped the car. All fuses are good now but till same problem.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

We seems to be going in circles.

If you have an ECM, I guess now its the time to test it.

By the way you mentioned that fuel is not present and the fuel pump worked if direct voltage is applied. Why don't you try applying direct voltage and try starting.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Hello again, I applyed direct voltage to the fuel pump(fuel pump work) engine only crank but no star.I repalced the PGM-FI relay and the ligths seem Ok now. I check all fuses driver side with a test light, on fuse #13 7.5A there no power, and went I put the key ON and pres the cluth the #2 wire on the PGM-FI plug there is no power.
PGM -FI plug test
1-PGM-FI #3 ground- yes
2-PGM-FI #7 voltage yes
3-PGM-FI- #5 voltage yes
4-PGM-FI #2 PGM-FI with pedal clutch in NO voltage
and No + power on #13 fuse driver side but fuse is OK.
Any idea whats wrong with this car?
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

Did you test both ends of Fuse # 13 forpower supply?

No power at fuse # 13 ( 7.5 A). Test if fuse # 11 and # 12 have voltage under same conditions as described.

If no to above, Check Fuse # 41 (100 A ) underhood.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Hi Guys, yes I test all the fuses on both ends and #11 & #12 have power when the swith is on. Exept on #13 ther is no power. Underhood #41 is good.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

Fuse 11, 12 and 13 are on the same circuit and your diagnosis shows a faulty fuse junction box.

Without power from Fuse # 13, the fuel pump would not continue running after the ignition switch is returned from start.

Apply battery voltage to Fuse 13 and see if you are able to start.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Hi guys, I check all fuses all are OK. I have voltage on all the fuse box but not on the #13 7.5A only.
Also I check the fuel pump plug there are 5 wire;
(1) TESTED with a test light and KEY ON possition;
1- white/red line wire ---good + voltage
2-yellow/blue line wire---less + voltage
3-(2)black/silver dot wire--ground
4-black/yellow line wire----NO VOLTAGE

(2) TESTED the PGM-FI relay connector(key OFF) with a jumper wire on 4 and 5 NO voltage on black/yellow wire of the fuel pump plug.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi nando39,

The Black/Yellow wire for fuel pump runs through the fusebox before going to fuel pump at tank.

Fuse 13 has no power supply.

The fuse box has internal fault and is not transmitting power supply.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
NANDO39
  • MEMBER
Hi guys, I changed the fuse box and the PGM-FI relay from my friend car but no star yet. I think At this point it had to be the PCM or ignition swith.
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Friday, November 23rd, 2018 AT 6:52 PM (Merged)
Tiny
MARTYLEEHODGEJR
  • MEMBER
  • 1991 HONDA ACCORD
  • 4 CYL
  • FWD
  • MANUAL
  • 11,000 MILES
I need to know where the fuel pump is and how long it takes to change one
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Wednesday, July 31st, 2019 AT 12:08 PM (Merged)

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