Question about 1991 Toyota Pickup

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95 camry fuel pump low voltage

Yellow w red stripe wire only wire to fuel pump with voltage, very low. no relay or fuse, how does one diagnose this?

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  • chris killeen
    chris killeen Nov 15, 2008

    No. It's the non-existent relay behind and above the glove box. Only by tracing the wire, which is blue\black strip\grey spots, could I find it. Techs at toyota didn't know about it. Special order from dealer and very expensive, for a relay. Bigger than most, green in color, 5 blades all same direction.
    Thanks!

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  • Toyota Master
  • 1,861 Answers

Check the EFI fuse. Is it blown?

Posted on Nov 14, 2008

  • Toyota Ed Nov 15, 2008

    I apologize for clicking on the solution box. I meant to ask for a clarification.I am a little confused, also, The header of your post states "Camry", but is that what you have? Hence my post about the fuse. Please advise, I am also interested in the relay behind the fuse box. As a Toyota svc mgr, this particular diagnosis intrigues me. Please comment back more info.

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1 Answer

95 Camry 2.2, no power at fuel pump / relay & fuses are good


The fuel pump relay (circuit opening relay) has 5 wires.
black white is power from a 10amp fuse
black orange is power from the EFI relay
green and red is the signal from the computer
black is ground for the relay
blue black is power out to the pump
Which wire are you saying has no power ?

May 15, 2013 | Cars & Trucks

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What typically is needed to to be done if a 2001 supercrew has had air bags deployed and wont start after that. The switch in the right kicker panel for the fuel pump does not appear to have been tripped....


Good info on the PATS / theft light. Looks to be the PATS / HEC operation is functioning correctly

The Fuel inertia switch only cuts power to the fuel pump, so if tripped, the truck would have a crank no start issue. Do you have a crank no start, or no crank issue.

To reset, just press down on it. To check if the switch is tripped, check for power at the connector to the fuel inertia switch

Engine compartment fuse # 10 ( 20A ) to the fuel pump relay -> Dark Green w/ yellow stripe wire to the fuel inertia switch -> pink w/ black stripe wire to the fuel pump module.
Check the pink w/ black stripe wire to ground with a meter for power, with the key in the run position.

If you turn the key from off to run ( do not start ) you should hear the fuel pump cycle ( hum, then turn off ).

Could be an issue with the fuel pump relay ( my '01 had a crank no start at ~ 35K miles, bad fuel pump relay ). I proved this out ( after a stupid ID10T error in my diagnoses process ) by jumpering the normally open contacts in the fuel pump relay socket, and then installing the trailer tow reverse circuit relay into the fuel pump relay socket ( same full size Ford Relay ).

Jumpering the fuel pump relay in the relay socket ( remove relay and use jumper wire ), red line
sscullys_16.jpg

If you have a no crank issue, could be the DTR ( Digital Transmission Range ) sensor on the driver's side of the trans is out of alignment.

Check the start motor relay ( on the firewall on the passenger side ) for power on the Tan w/ Red stripe wire when the key is in the start position ( this is from the ignition switch through the DTR when in park or neutral to the starter motor relay ).

You can test another route, turn the key to the run position, and apply power to the Tan w/ Red stripe wire on the starter motor relay in the engine compartment on the firewall. BE CAREFUL, the motor should turn over, keep clear of moving parts.

Post back a comment to this problem with the results of the testing.

Thanks

Nov 03, 2010 | 2001 Ford F150 Styleside SuperCrew

1 Answer

I dont have power on a 89 camaro rs fuel pump


First of all you will only have voltage for 2 seconds after key is turned on from the fuel pump relay. after that when you begin to spin the engine over oil pressure then builds up and closes the contacts on the oil sending unit causing the fuel pump to stay powered up as long as it's spinning or it's crunk and running.
so while you check for power on the tan with white stripe at fuel pump , have someone bump the engine over, if you have power up until about 2 seconds after they let off the key then check ground to pump if it's ok then you'll need a fuel pump.
If you don't have voltage when it's spun over then check the red wire coming from the oil sending unit the same way you checked it at the fuel pump.
If you have voltage then check inline fuse beside the battery. if fuse is'nt blown then check for broken wire from there to fuel pump.
If you don't have voltage from red wire at oil sending unit then check for voltage on orange wire at sending unit, if you have voltage on the orange wire and not on the red wire while someone is spinning it over then replace the oil sending unit.
If you wanna do a quick check that makes sure your relay isn't the problem Go to your 12 way diagnostic connector under dash by stearing wheel. and touch a battery hot wire to pin G if relay is ok the you should hear the fuel pump come on.

Jan 13, 2010 | 1989 Chevrolet Camaro

1 Answer

1997 Ford F150 Electric Fuel Pump will npt pump


Did you check the fuel inertia switch in the passenger side kick panel ?

The fuel pump is powered :
the fuse to the fuel pump relay.
The fuel pump relay to the fuel inertia switch
The fuel inertia switch to the fuel pump itself.

At the fuel inertia switch in the kick panel, power from the relay is the Dark Green w/ Yellow stripe wire and the pink w/ black stripe wire is the power. from the fuel inertia switch to the fuel pump.

If you jumper the fuel pump relay, you should hear it run. If not pull the fuel pump relay, and check the pins in the relay socket, pin 30 should be the power from the fuse.

50b0c31.jpg

If you have power at pin #30, jumper the relay socket as shown with the red line above, and check the dark green w/ yellow stripe wire at the fuel inertia switch for power.
Press the button on the top of the fuel inertia switch, and check for power leaving the fuel inertia switch on the pink w/ black stripe wire.

This is tests good, check for power at the fuel pump, same pink w/ black stripe wire.
Fuel inertia switch info is in the owners manual, If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

Jan 03, 2010 | 1997 Ford F150 Regular Cab

2 Answers

No power to the fuel pump


Once you check the fuel inertia switch in the passenger's side kick panel, next is to check the fuel pump fuse, engine compartment fuse # 10.

If this checks OK ( power on both sides ), you can pull the fuel pump relay, and jumper it.

The engine compartment fuse panel is where the fuel pump relay is located at ( relay # 301 ). Pull the fuse pump relay out of the socket, and using the diagram below, with the red line, momentarily jumper the Normally open contacts, you shoud hear the fuel pump run. ( mind the pin orientation when doing this ) :
86000f6.jpg

I had a bad fuel pump relay on my 2001 F-150 @ ~ 36K miles. Replaced with the trailer tow battery charge relay ( relay #302 next to it ) and it worked again.
The symptom I had was a crank no start ( theft light on dash went out ).

If the fuel pump does not run, and power is on pin #30 in the relay socket, next is to check the output of the fuel inertia switch in the passenger side kick panel. The output of this is the Pink w/ Black stripe wire. The connector to the fuel pump inertia switch should be a 2 pin connector, the other color in the connector is Dark green w/ Yellow stripe wire ( that is from the pin #87 in the relay socket in the engine compartment ).

If that circuit has power at the passenger side kick panel, next is to check for power at the fuel pump at the fuel tank. The fuel pump motor is the same Pink w/ Black stripe wire. The connector is a 4 pin connector with black ( ground for the fuel pump ) black w/ orange stripe ( ground for the fuel level ) and yellow w/ white stripe ( to the instrument cluster for the fuel gauge ).
When testing by the fuel tank, make sure you have a good ground for the meter ( extension from neg on the battery or trailer tow adapter ) as that could also be a problem under the truck.

Sorry for war and peace, hope it helps.

Nov 17, 2009 | 2001 Ford F150 Styleside SuperCrew

1 Answer

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The fuel pump relay is behind the kick panel on the drivers side. The wire colors coming out of the relay should be Black w/ Red stripe, Black w/ White stripe, Black w/ Yellow stripe and Black w/ Purple stripe.

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1 Answer

Which relay is the fuel pump relay?


Can't find my picture right now, but look for a relay with following wires in connector. Dark blue/w yellow stripe, dark blue, dark green w/black stripe, & red w/white stripe. that should be it.

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1 Answer

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bad or loose ground check accordingly

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2 Answers

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