Fuel pump shutoff switch

Kaleb · 04-04-2007, 03:53 PM

I know there are many of these threads, but I have yet to find one that has information as to where I can get a hold of a fuel pump wire. If anyone knows of any spots let me know!

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drguitarum2005 · 04-04-2007, 03:58 PM

fuel pump is on top of the gas tank, just look and trace

Kaleb · 04-04-2007, 06:32 PM

well I cant see anything without taking the tank out. I've done it before, and it is not fun, nor is it easy. Especially with out help, and a full tank.

4Crawler · 04-04-2007, 07:34 PM

Circuit Opening relay controls the fuel pump, might be easier to get to:
- http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump

drguitarum2005 · 04-04-2007, 07:46 PM

according to that diagram, one should be able to place a toggle (or any kind of interrupt switch) somewhere on the ignition relay circuit, like between the ignition fuse and the main relay or between the main relay and its ground, correct? unless I don't see something, this should act as a kill switch for shutting down the fuel system in an emergency, right?

4Crawler · 04-04-2007, 07:59 PM

CO Relay ground connection would be easy and low current.
CO relay will shut down any time the engine stops (thus letting the AFM close).

drguitarum2005 · 04-04-2007, 08:07 PM

I think I'll hit one of the relay grounds with a toggle for a fuel system cutoff switch versus the power wire to the pump. physically where are these relays? ive got diagrams of my particular wiring for it all but I don't know where in the vehicle there are...i wanna say theyre either in or next to the engine-compartment fuse box

4Crawler · 04-04-2007, 08:10 PM

Might want to read the page I posted a link to, describes the location, at least on the 1st gens. Otherwise, the FSM for your year vehicle should show the relay locations if you look hard enough.

Kaleb · 04-04-2007, 08:14 PM

I was originally going to tap into the EFI but I could'nt figure out how to open the fuse box. It seems that if I want to put in a switch on the CO relay then I will still have to get to the bottom of the fuse box. Does anyone know how to open the damn thing?

drguitarum2005 · 04-04-2007, 08:49 PM

Quote:

Originally Posted by 4Crawler

Might want to read the page I posted a link to, describes the location, at least on the 1st gens. Otherwise, the FSM for your year vehicle should show the relay locations if you look hard enough.

touche. shame on me for not reading first

drguitarum2005 · 04-05-2007, 03:54 PM

i just got done putting one in in a hidden location. i ended up doing the FP power wire because of location and convenience. its working just fine thus far.

Kaleb · 04-05-2007, 08:30 PM

I also just finished doing mine. I decided to go with a relay though. Better safe then sorry.

^VooDoo^ · 04-06-2007, 06:11 PM

On the 2gen's the COR is passengerside above the ECU.

chopitrakeit · 04-08-2007, 03:59 PM

harness for pump should run up through floor and along passesger side to a connector by the computer. On my 89 3.0 the fuel pump wire is blue. I know this cuz it broke. lift the plastick door jam plate and roll back the carpet. If you do tap in there, solder nad heat shrink it cuz it gets damp under there esp in winter ( if you live in the snow areas). Also clean up and grease that connector while you have it apart. Mike

04-04-2007, 03:58 PM	#2 (permalink)
drguitarum2005 Contributing Member Join Date: Dec 2005 Location: Houston (home), Atlanta (school), Cincinnati (work) Posts: 2,235	fuel pump is on top of the gas tank, just look and trace __________________ -David 2000 Taco TRD Access Cab v6 \| 5spd \| 33" BFG A/Ts \| 33" PC Mud Terrains \| OME 882's \| Bilstein HD struts front \| Rancho shocks rear \| Chevy 63" leaf spring swap \| Custom sliders \| Custom front bumper \|3" BL \| U-Bolt flip \| Flowmaster exhaust \| Kenwood Speakers \| Grey Wire Mod \| Aux. Reverse Lights \| Deckplate Mod \| Lots of lights Pictures

04-04-2007, 06:32 PM	#3 (permalink)
Kaleb Registered User Join Date: Sep 2006 Location: Oregon City, OR Posts: 635	well I cant see anything without taking the tank out. I've done it before, and it is not fun, nor is it easy. Especially with out help, and a full tank. __________________ MY BUILD

04-04-2007, 07:34 PM	#4 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,832	Circuit Opening relay controls the fuel pump, might be easier to get to: - http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

04-04-2007, 07:46 PM	#5 (permalink)
drguitarum2005 Contributing Member Join Date: Dec 2005 Location: Houston (home), Atlanta (school), Cincinnati (work) Posts: 2,235	according to that diagram, one should be able to place a toggle (or any kind of interrupt switch) somewhere on the ignition relay circuit, like between the ignition fuse and the main relay or between the main relay and its ground, correct? unless I don't see something, this should act as a kill switch for shutting down the fuel system in an emergency, right? __________________ -David 2000 Taco TRD Access Cab v6 \| 5spd \| 33" BFG A/Ts \| 33" PC Mud Terrains \| OME 882's \| Bilstein HD struts front \| Rancho shocks rear \| Chevy 63" leaf spring swap \| Custom sliders \| Custom front bumper \|3" BL \| U-Bolt flip \| Flowmaster exhaust \| Kenwood Speakers \| Grey Wire Mod \| Aux. Reverse Lights \| Deckplate Mod \| Lots of lights Pictures

04-04-2007, 07:59 PM	#6 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,832	CO Relay ground connection would be easy and low current. CO relay will shut down any time the engine stops (thus letting the AFM close). __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club Last edited by 4Crawler; 04-04-2007 at 08:00 PM.

04-04-2007, 08:07 PM	#7 (permalink)
drguitarum2005 Contributing Member Join Date: Dec 2005 Location: Houston (home), Atlanta (school), Cincinnati (work) Posts: 2,235	I think I'll hit one of the relay grounds with a toggle for a fuel system cutoff switch versus the power wire to the pump. physically where are these relays? ive got diagrams of my particular wiring for it all but I don't know where in the vehicle there are...i wanna say theyre either in or next to the engine-compartment fuse box __________________ -David 2000 Taco TRD Access Cab v6 \| 5spd \| 33" BFG A/Ts \| 33" PC Mud Terrains \| OME 882's \| Bilstein HD struts front \| Rancho shocks rear \| Chevy 63" leaf spring swap \| Custom sliders \| Custom front bumper \|3" BL \| U-Bolt flip \| Flowmaster exhaust \| Kenwood Speakers \| Grey Wire Mod \| Aux. Reverse Lights \| Deckplate Mod \| Lots of lights Pictures

04-04-2007, 08:10 PM	#8 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 7,832	Might want to read the page I posted a link to, describes the location, at least on the 1st gens. Otherwise, the FSM for your year vehicle should show the relay locations if you look hard enough. __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

04-04-2007, 08:14 PM	#9 (permalink)
Kaleb Registered User Join Date: Sep 2006 Location: Oregon City, OR Posts: 635	I was originally going to tap into the EFI but I could'nt figure out how to open the fuse box. It seems that if I want to put in a switch on the CO relay then I will still have to get to the bottom of the fuse box. Does anyone know how to open the damn thing? __________________ MY BUILD

04-05-2007, 03:54 PM	#11 (permalink)
drguitarum2005 Contributing Member Join Date: Dec 2005 Location: Houston (home), Atlanta (school), Cincinnati (work) Posts: 2,235	i just got done putting one in in a hidden location. i ended up doing the FP power wire because of location and convenience. its working just fine thus far. __________________ -David 2000 Taco TRD Access Cab v6 \| 5spd \| 33" BFG A/Ts \| 33" PC Mud Terrains \| OME 882's \| Bilstein HD struts front \| Rancho shocks rear \| Chevy 63" leaf spring swap \| Custom sliders \| Custom front bumper \|3" BL \| U-Bolt flip \| Flowmaster exhaust \| Kenwood Speakers \| Grey Wire Mod \| Aux. Reverse Lights \| Deckplate Mod \| Lots of lights Pictures

04-05-2007, 08:30 PM	#12 (permalink)
Kaleb Registered User Join Date: Sep 2006 Location: Oregon City, OR Posts: 635	I also just finished doing mine. I decided to go with a relay though. Better safe then sorry. __________________ MY BUILD

04-06-2007, 06:11 PM	#13 (permalink)
^VooDoo^ Contributing Member Join Date: Mar 2006 Location: Alhambra CA. Posts: 395	On the 2gen's the COR is passengerside above the ECU.

04-08-2007, 03:59 PM	#14 (permalink)
chopitrakeit Registered User Join Date: Mar 2004 Posts: 115	harness for pump should run up through floor and along passesger side to a connector by the computer. On my 89 3.0 the fuel pump wire is blue. I know this cuz it broke. lift the plastick door jam plate and roll back the carpet. If you do tap in there, solder nad heat shrink it cuz it gets damp under there esp in winter ( if you live in the snow areas). Also clean up and grease that connector while you have it apart. Mike __________________ 1995 xcab with blown up 3.0, soon to be 3.9 Cummins.Plans for SAS as well. 1989 4Runner daily driver, 3.0, 3.5 body lift, 35" MTR's. 10-20=Can,NB,SJ. pics: http://www.flickr.com/photos/7439309@N02/

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