'87 Bronco II, both fuel pumps dead - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Bronco Forum Forum for discussion of the Ford Bronco

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 12-18-11, 04:10 PM Thread Starter
Registered User
 
Join Date: Dec 2011
Posts: 2
'87 Bronco II, both fuel pumps dead

The EEC power relay works and powers the Computer, however the computer is not turning on the fuel pump relay. I verified no open wire between computer and fuel pump relay.

I used the diagnostic link connector to test the fuel pump operation and they both still didn't operate.

I have a spare computer and swapping it out didn't change the symptoms.

I have disconnected the computer and manually energized the fuel pump relay. The pumps still don't operate.

Is there anything that may cause both problems or am I looking at 2 problems here ?

1. Fuel pump relay not being energized.
2. Open wire power/ground/or both to pumps.

Thanks,
Ron

rmillerinboise is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 12-18-11, 04:24 PM
2002 F150 XLT
 
Bert's Avatar
 
Join Date: Nov 2008
Location: Oregon
Posts: 10,312
Re: '87 Bronco II, both fuel pumps dead

Is there power at the relay? If there is, have you checked the inertia switch? Check the diagram here. Fig 1 1nnd 2 in the 87 model. http://www.autozone.com/autozone/rep...00c152800781b2

Bert
Bert is offline  
post #3 of 5 (permalink) Old 12-19-11, 07:03 AM Thread Starter
Registered User
 
Join Date: Dec 2011
Posts: 2
Re: '87 Bronco II, both fuel pumps dead

Yes Bert, there is power to the relay and when I energize it manually, power shows up on the other side as it should. I have the inertia switch bypassed so power gets through there too, but the pumps don't run.

Tonight I will try to find why power doesn't seem to make it to the pumps. After I find that, I still have the problem of why the relay doesn't get energized by the computer in the first place.

Seems odd to have two problems like this at the same time. I've got a feeling that there's just one problem that will fix both symptoms.

I'm wondering if disconnecting the computer could be a problem. I'll connect it back tonight and reconnect the factory bypass for testing the pumps.
rmillerinboise is offline  
post #4 of 5 (permalink) Old 06-16-15, 04:56 PM
Registered User
 
Join Date: Jun 2015
Posts: 3
What was the outcome I'm having the same problem with mine
miketompaul is offline  
post #5 of 5 (permalink) Old 06-16-15, 06:44 PM
Dazed and Confused
 
CatSkinner's Avatar
 
Join Date: May 2012
Location: Upstate New York
Posts: 5,902
Re: '87 Bronco II, both fuel pumps dead

You need to find out where you have and don't have voltage. If you can read electrical schematics, maybe these can help.

http://www.autozone.com/repairinfo/r...00c152800781b2

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
CatSkinner is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Bronco Forum


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome