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Wiring Diagram 89 Ford Bronco Ii 2.9 Power Control Relay

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  • #2

On the metal panel on the passenger side inner fender.

It may be hidden with a plastic cover between the fender and
the air cleaner box.

I can never remember which relay is which... There are three relays down there.
One black which is for the A/C wide open throttle cutout.

the ones I always confuse are the brown one and the green one.
One is the EEC Power Relay the other is for the fuel pump.
And I simply can't remember which is which...

Yeah, I have an '87, but I can't run outside and look,
I converted my '87 to a '93 4.0 and used the wiring from
the '93 Explorer I used as a donor.

AD

  • #4

Green is fuel, brown is ECC.

ECC could be out as that opens the circuit for the fuel pump relay (see wiring diagram on autozone or something.) Could also be a fuse link.

Well, back to drinking beer.

:beer:

Pete

  • #6

Psychopete, are you suggesting that if the relay, harness, fuse links etc... all look to be okay, or should I say do not have power going to them, that the problem could be the computer itself and need to be replaced? Is this a common problem for these trucks.

I wouldn't rule it out, but a bad PCM is EXTREMELY uncommon. Even if the PCM isn't getting powered itself (from the brown relay), obvious the PCM is not going to be able to turn on the pumps.

Seriously, get on autozone, look at the repair guides, under chassis electrical, then get to wiring diagrams. You'll see your engine listed. The wiring colors are not right, but the circuits generally are. It's a lot easier when you can "see" how it works.

Pete

  • #8

ECC (engine control computer) = PCM or ECM or ECU, etc.

I need to pick one and stick with it :).

Pete

  • #9

Code 96

well unfortunatley, i have been experiencing the same problem. started with a code 95, which just happend to be a loose connector on the drivers side all by its lonesome self. i cut that bitch out and put in an inline fuse for that problem.NOW a code 96 showed up. with no power to the fuel pump, i was wondering what to test for at the relay connectors. How do i test if its a bad relay. which one should i start with.I know theres two there, but the wiring diagram shows that the eec doesnt run with the fuel pump circuit. im confused, since i have heard and seen on here otherwise.

I have already determined that the issue is past the fusible links, running through the two yellow wires. I have already studied and looked at the wiring diagram for the engine for hours, trying to figure out what to do and where to continue my search...:icon_hornsup:

  • #11

Emergency Shut Off

You Should Check Your Emergency Fuel Pump Shut Off Switch, Located Just Under The Top Of The Carpet On Passenger Foot Area. Push The Reset Button. Mine Was Bad. Didn't Have The Extra $50.00, So I Just Bypassed It. Started Right Up!

Last edited:

Source: https://www.therangerstation.com/forums/index.php?threads/2-9-fuel-pump-relay-location.6629/

Posted by: greaseusedfor.blogspot.com