Previous in Forum: Freon 134A Why Does it Burn?   Next in Forum: Tesla Model X
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
11 comments
Rate Comments: Nested
whitemfox
Member

Join Date: Sep 2015
Posts: 7

90 Ford Ranger 2.9L

09/01/2015 4:33 PM

Truck wont start unless I run a jumper wire from the positive side of battery to the red wire on the fuel injector harness. Relays all have power and I am getting fuel up to the schrader valve
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
4
SHOCKHISCAN
Guru

Join Date: Nov 2007
Location: Eastern Arizona mountains on Route 666 about a mile from God's country
Posts: 1676
Good Answers: 122
#1

Re: 90 Ford Ranger 2.9L

09/01/2015 5:00 PM

I just went through this with my relative's Ford Ranger truck of the same year.

There is a master fuse located on the main fuse panel under the hood on the driver side fender.

There is a heavy black wire that comes up from the bottom of the engine compartment and attaches to a small rectangular fuse on the inside of the fuse panel on the engine side.

This fuse powers all of the Ranger's auxiliary power devices and if open, will keep the truck from starting.

Look closely as it is well camouflaged.

I would buy two fuses in case the fault that caused the fuse to open is still present in the electrical system.

In my case my relative screwed up and had to have a breathalyzer unit installed on the truck and after the installation the truck would not run. He had to tow the vehicle home after the installer, a Ford dealership, and two aftermarket repair shops couldn't find the problem.

The cause? The breathalyzer installer crossed the negative and positive leads on the breathalyzer.

If the master fuse is intact with power present in and out of it I would look at replacing the ignition switch contact block. It is mounted on the steering column under the driver's side dash. Very hard to access.

Hope this helps.

__________________
 They said; "Brain size?" I heard; "Train size?" so I said: "I'll take a small one, thank you."
Register to Reply Good Answer (Score 4)
No more Good Answers. Go to first "Almost" Good Answer
Usbport
Guru
Engineering Fields - Optical Engineering - Member Engineering Fields - Engineering Physics - Member Engineering Fields - Systems Engineering - Member

Join Date: Apr 2010
Location: Trantor
Posts: 5363
Good Answers: 647
#2
In reply to #1

Re: 90 Ford Ranger 2.9L

09/01/2015 5:24 PM

Breathalyzer?

Too much ethanol in the gas?

__________________
 Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
Register to Reply
SHOCKHISCAN
Guru

Join Date: Nov 2007
Location: Eastern Arizona mountains on Route 666 about a mile from God's country
Posts: 1676
Good Answers: 122
#7
In reply to #2

Re: 90 Ford Ranger 2.9L

09/01/2015 7:02 PM

My nephew's brilliant words; (pretty much)

Yep I waz enebriated cording to the duh ocifer nd 2 drunk 2 drove.

Duh ocifer said I waz stinky but wasn't sure if it was gas or duh alkehol in my breth butt he wudn't believe it waz frum duh etanol in duh tank.

I told him he is suffering from terminal dumb ass but what do I know?

__________________
 They said; "Brain size?" I heard; "Train size?" so I said: "I'll take a small one, thank you."
Register to Reply Off Topic (Score 5)
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#11
In reply to #7

Re: 90 Ford Ranger 2.9L

09/02/2015 4:37 AM

OK but I'm still curious about what a breathalyzer is in a vehicle. I suppose it could be to prevent the engine starting when you've had a few, but I've not heard of it before. BTW maybe the installer was half-p****d when he fitted it!

__________________
 Give masochists a fair crack of the whip
Register to Reply Off Topic (Score 5)
whitemfox
Member

Join Date: Sep 2015
Posts: 7
#5
In reply to #1

Re: 90 Ford Ranger 2.9L

09/01/2015 6:18 PM

Thanks for the answer but I have power to everything, except the fuel injectors. the fuel pump works, I am getting spark to the plugs. all the fuses on the panel have power, The relays all have power.so I am lost on what to check next.
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#6
In reply to #5

Re: 90 Ford Ranger 2.9L

09/01/2015 6:53 PM

You have to trace the back on the dead line until you find the juice...it might be the relay for the fuel system from the ECM...

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
whitemfox
Member

Join Date: Sep 2015
Posts: 7
#8
In reply to #6

Re: 90 Ford Ranger 2.9L

09/01/2015 7:07 PM

Do you think it could be the EMC itself just not sending juice to it. Those things are kind of spendy even at junkyards and the id model I have no one has anyway
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#10
In reply to #8

Re: 90 Ford Ranger 2.9L

09/02/2015 2:30 AM

It might be the EEC relay, if you have one, I'm not sure on that engine....

"The EEC Power Relay not only supplies battery voltage to the Fuel Injection Computer (also known as the E.E.C. Electronic Control Assembly), but also supplies power to the fuel injectors, the fuel pump relay, and a few other emissions related solenoids.

The EEC Power Relay is easy to recognize because it's usually a Brown color. If the EEC Power Relay has already been replaced... you can still recognize it by its Brown colored connector."

http://www.therangerstation.com/forums/showthread.php?t=100888

http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/eec-power-relay-tests-1

http://www.justanswer.com/ford/7p1op-ford-ranger-88-ford-ranger-2-9-v6-on-passenger.html

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
WAWAUS
Guru

Join Date: Aug 2010
Location: Melbourne, Australia
Posts: 740
Good Answers: 24
#9
In reply to #5

Re: 90 Ford Ranger 2.9L

09/02/2015 1:03 AM

Does it have a tachymetric relay which is intended to cut power to the injectors if the engine stops (in an accident). If that relay has failed the engine will not start!
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3

Re: 90 Ford Ranger 2.9L

09/01/2015 5:54 PM

Just make sure it doesn't touch the other wire...

x-O

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#4

Re: 90 Ford Ranger 2.9L

09/01/2015 6:15 PM

If all else fails get the wiring diagram and trace out the problem....make sure all the wiring connections are clean, I always use a little conductive grease to maintain a good connection....

http://www.autozone.com/repairguides/Ford-Ranger-Bronco-II-1983-1990-Repair-Guide/WIRING-DIAGRAMS/WIRING-DIAGRAMS/_/P-0900c152800781b2

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply
Register to Reply
Have a Different Question?
11 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Codemaster (1); PWSlack (1); SHOCKHISCAN (2); SolarEagle (3); Usbport (1); WAWAUS (1); whitemfox (2)

Previous in Forum: Freon 134A Why Does it Burn?   Next in Forum: Tesla Model X

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Transportation:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (56 right now)
Show Members
Advertisement