Looking For EEC Relay On A 1985 FullSize Bronco

10782 Views 17 Replies 10 Participants Last post by themike, Oct 3, 2016

Wolfgangpeanut

Discussion Starter · Feb 10, 2008

Im looking for the EEC Relay for my 1985 bronco. My bronco wont start and ive checked everything, including the module on distributor (which is new) and the coil (which is new). I heard from someone that the eec relay powers the main computer in the bronco and it can go bad causing the vehicle to still turn over but get no spark which is the problem i am having. Try as i might i cant seem to find the darn relay and im not able to find a picture or diagram either. if anyone knows where its at or can direct me to a picture, that would be a huge help. Thanks guys.

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JimDez

· #2 · Feb 10, 2008

85 EEc Relay

Wolfgangpeanut said:
Im looking for the EEC Relay for my 1985 bronco. My bronco wont start and ive checked everything, including the module on distributor (which is new) and the coil (which is new). I heard from someone that the eec relay powers the main computer in the bronco and it can go bad causing the vehicle to still turn over but get no spark which is the problem i am having. Try as i might i cant seem to find the darn relay and im not able to find a picture or diagram either. if anyone knows where its at or can direct me to a picture, that would be a huge help. Thanks guys.

I just went through tracking my EEc relay down on 85 Bronco. It is just behind the engine computer, above the gas pedal. Look in back of the rear defroster switch about 3 inches. When you find it check all you wiring to connector. I found where previous owners had butchered the wiring and their splices had fallen apart.

Check your fuel pressure to verify it is not the fuel relay.

Ugly Bronco

· #3 · Feb 10, 2008

Dumb question, but is the mil (malfunction indicator lamp) comming on when you turn on the ingnition? If yes then it's not an EEC relay. If the MIL doesnt come on, swap the EEC for the FP (fuel pump) relay and see if it lights. If it doesn't, then check that circuit for continuity. Keep us posted.

Wolfgangpeanut

Discussion Starter · #4 · Feb 11, 2008

i have a stupid question in response to ur stupid question

what/where is the malfunction indicator lamp? im gona be honest and tell everyone im just learning about the deeper knowledge in cars such as electrical/relays/wiring and not just wrench turning and manifolds and stuff.

Wolfgangpeanut

Discussion Starter · #5 · Feb 11, 2008

JimDez said:
I just went through tracking my EEc relay down on 85 Bronco. It is just behind the engine computer, above the gas pedal. Look in back of the rear defroster switch about 3 inches. When you find it check all you wiring to connector. I found where previous owners had butchered the wiring and their splices had fallen apart.

Check your fuel pressure to verify it is not the fuel relay.

btw, thank so much, ive been trying to track that thing down for a couple weeks. and yeah im gona try that. i dont think the wiring should be bad though because my father owned it before me and never changed the relay out or rooted around near it.

Steve83

· #6 · Feb 13, 2008

Ugly Bronco said:
...swap the EEC for the FP (fuel pump) relay...

They don't swap on pre-'92 trucks. Read this thread.

Wolfgangpeanut said:
what/where is the malfunction indicator lamp?

There's not one on pre-'87 trucks. There's an "EMISSIONS" lamp at the upper L of some '84-86 clusters, but it doesn't behave exactly the same as a MIL/CEL.

Wolfgangpeanut said:
i dont think the wiring should be bad though because my father ...never changed the relay out or rooted around near it.

Do some searching. :deal It's very common for those older relay sockets to break loose from their wiring. See the link above in this post...

Wolfgangpeanut

Discussion Starter · #7 · Feb 20, 2008

well. i found the eec relay on my bronco. and the fuel pump relay by accident. the fuel pump relay is on the driver side firewall near the fender to the right of the vaccume booster for the brakes. and the eec relay is behind the dash, roughly above the gas pedal and to the right a little behind the blower switch about 3 inches. oh and it turns out neither was the problem. the problem is the ignition coil, which is weird becuase this makes my FOURTH one ive replaced in about 300 total miles. im not sure if its poor manufacturing because i keep going with the 20 dollar autozone ones, which i never will again, or if as my dads friend suggested, it might be the ballast resistor, which im not sure if my vehicle has one. any ideas?

Steve83

· #8 · Feb 20, 2008

Wolfgangpeanut said:
the problem is the ignition coil, which is weird becuase this makes my FOURTH one ive replaced in about 300 total miles. im not sure if its poor manufacturing because i keep going with the 20 dollar autozone ones...

:doh0715::twak:smilie_slap:smilie_slap:smilie_slap:smilie_slap:smilie_slap

Wolfgangpeanut said:
it might be the ballast resistor, which im not sure if my vehicle has one.

Have you looked at the wiring diagrams in Haynes? :deal

Fireguy50

· #9 · Feb 20, 2008

http://fordfuelinjection.com/files/bronco_1986_29.gif

http://fordfuelinjection.com/files/bronco_1986_60.gif
http://fordfuelinjection.com/files/bronco_1986_61.gif
http://fordfuelinjection.com/files/bronco_1986_62.gif

http://fordfuelinjection.com/files/bronco_1986_103.gif

95thebroncoman351

· #10 · Feb 22, 2008

Wolfgangpeanut said:
ok this one is for the techies out there. My bronco has been frying coils left and right. I can hardly bring it up to operating temperature without frying a coil. (this makes 5 ive killed). I rented a scanner from checker auto and the thing said several things. First it said i have a PIP (Ignition Profile Pickup) circuit failure, what does this mean?

Second, it sais my Spout Connector is grounded, how do i check this?

i would have stopped after i fried the first two
pip signal is pretty much dizzy reference, with out it you comp is getting all sorts of confused. as afar as the spout being grounded i would check the harness and make sure that it has no shorts to ground any were and make sure it is not open as well

and buy a real coil

Alpha8965

· #11 · Jul 26, 2016

Just to let ALL the 4x4 drivers out there know, ADDING A LIFT KIT TO YOUR TRUCK DOES NOT INCREASE THE GROUND CLEARANCE OF YOUR VEHICLE, MATTER OF FACT, GROUND CLEARANCE IS MEASURED FROM THE LOWEST PART ON YOUR VEHICLE TO THE GROUND, not the highest point. So, if you have a truck with 12" lift and you think your ground clearance is 36", try to drive over a 30" Boulder and see if your Pumpkin allows you to continue to go in the direction you are trying to go, and "NO", putting your Tire on the boulder and trying to go over that way does NOT count, either. Your Trucks Drive Axel Pumpkin Height from the bottom to the ground is your actual "GROUND CLEARANCE" , Not the Height of your truck to the frame. Otherwise maybe you should be driving a Chevylay or Chittielae . Ford Owners Should K(no)w better...............

Gacknar

· #12 · Jul 26, 2016

Alpha8965 said:
Just to let ALL the 4x4 drivers out there know, ADDING A LIFT KIT TO YOUR TRUCK DOES NOT INCREASE THE GROUND CLEARANCE OF YOUR VEHICLE, MATTER OF FACT, GROUND CLEARANCE IS MEASURED FROM THE LOWEST PART ON YOUR VEHICLE TO THE GROUND, not the highest point. So, if you have a truck with 12" lift and you think your ground clearance is 36", try to drive over a 30" Boulder and see if your Pumpkin allows you to continue to go in the direction you are trying to go, and "NO", putting your Tire on the boulder and trying to go over that way does NOT count, either. Your Trucks Drive Axel Pumpkin Height from the bottom to the ground is your actual "GROUND CLEARANCE" , Not the Height of your truck to the frame. Otherwise maybe you should be driving a Chevylay or Chittielae . Ford Owners Should K(no)w better...............

WTF are you blathering about and why in the world did you revive a thread about finding the EEC relay from 2008?
:smilie_slap

miesk5

· #13 · Jul 26, 2016

Yo, I deleted the post by Alpha8965 to save space

Gacknar

· #14 · Jul 26, 2016 (Edited by Moderator)

miesk5 said:
Yo, I deleted the post by Alpha8965 to save space

I wanted to know what he is talking about before it was deleted, then I was going to clean the thread.

Eventually I'll delete our conversation also.

miesk5

· #15 · Jul 26, 2016

Yo,
OK, I will re-instate it..

Alpha8965

· #16 · Aug 12, 2016

Ugly Bronco said:
Dumb question, but is the mil (malfunction indicator lamp) comming on when you turn on the ingnition? If yes then it's not an EEC relay. If the MIL doesnt come on, swap the EEC for the FP (fuel pump) relay and see if it lights. If it doesn't, then check that circuit for continuity. Keep us posted.

For some reason, My bronco's computer is on the right side, just inside the door, behind the kick panel, and there is No fuel pump relay near it, but there is a fuel pump reset switch just under the left side of the glove box. have removed the dash looking for the fuel pump relay, there is no relay nor computer up underneath my dash above the accelerator pedal. My bronco is not listed as a bronco, it is listed as a U150 utility truck, but it was known as a 1985 Ford BRONCO, U150, w/ 5.0L, 302 V-8, w/ 4 Spd Manual Transmission, 4X4 Sports Utility Vehicle, Not a Bronco 4x4 truck. And the Bronco is 14' 7" long from bumper to bumper and 7' 6" wide with a ground clearance of 13" and a Ground to Frame height of 18" Stock. So, what I have figured out is that MY fuel pump and the bronco's fuel pump needs to be replaced. If there is ANYTHING else I could try before replacing the Bronco's Fuel Pump, Please, Let me know. Thanks.

Alpha8965

· #17 · Oct 3, 2016

OK, Ladies and Men and boys and girls,

I was Misinformed about the where-abouts of my computer in my 1985 Ford Bronco U150 Utility Bronco, 5.0 L , 302 CI, to fix the problem with my fuel pump continually running. My Computer in MY Bronco is behind the Right Kick Panel inside the Passengers Door. There are NO fuel Pump Relays next to it. The Fuel Pump Relays are under the hood on the drives side next to the Brake Master Cylinder. After letting my Bronco sit for a while, I found out that the computer FORCES the Fuel Pump to Run Continually when the Battery has DEAD CELLS in it to Protect the computer and EEPROM from being damaged by energy spikes. After having my battery replaced for FREE at the local Autozone, 72 month battery w/ 3 yr free replacement, My Bronco now runs GREAT and the computer is returning NO bad codes except for 1. When I checked on that code, it says my Bronco is Mad at MY Wife because she hurts herself when getting in or out of her seat and blames it on the Bronco for NOT liking her. So, IF YOU HAVE A 1983 TO 1986 FORD BRONCO WITH GLASS HEADLAMPS AND IT HAS A CONTINUALLY RUNNING FUEL PUMP, HAVE YOUR BATTERY CHECKED FOR DEAD CELLS, IT MAY BE THAT SIMPLE. My battery charged to 12.7 VDC with 456 amps in 1 hr and after leaving it on charge overnight, the battery had a charge of 7.42 VDC and 003.5 Amps, which that told the Parts Reps to replace the battery. So, have your battery checked when you start having troubles with your electrical systems. Thanks for all your help.

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themike

· #18 · Oct 3, 2016

Relay for fuel pump should be on the fire wall, near power brake booster. Upper left corner

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