fuel pump voltage

[Bo-bo]

My 89 bronco died yesterday, would not start again. When I tried to start it again it seemed to turn fine, but was missing spark or fuel. I started looking at the coil and it was delivering voltage. I pulled the line after the fuel filter and was getting nothing through it. I pulled both lines to and from the fuel pump and have gas to, but not through. I pulled the pump and was 2 secounds from sending the wife for a new fuel pump after she went to class that afternoon, when I thought I wanted to be sure that was the problem. I took to jumper wires, I had her hold the two ends to a battery, while i hit the terminals of the fuel pump with juice. The pump fired right off. Well with this, I went back down to my bronco and checked the voltage with the ignition switch turned over. I had 6.7 volts at the two leads for the fuel pump.

I then talked with a friend about the problem, he suggested that there might be a weak fuel pump relay, or a fuseable link that was partly fried. I looked in the handbook and read that there is supposed to be a fuseable link near the starter relay. I could not see one, does anyone have any advise about how to get this problem resolved? I already thought about splicing into a keyed power circuit sand running a new wire, but will only do that as a last resort. Thanks for any replies

 

[Yardape]

Replace the fuel pump relays. There are two on an '89. I can all but guarantee this will fix your problem.

 

[Bo-bo]

Where are they located? are they the same part #'s?

 

[Yardape]

There is one green one and one Brown one, I cannot switch them on mine so I would have to say no. Makes sense cause ones for a high pressure pump and ones for low pressure. They are one the air filter bracket. cant miss them, right in front of you. If in doubt bring them with you when you go to get the new ones, dont cheap out and buy one, replace them both. Then you can find out which one still worked and you have a spare. They are really cheap.

 

[Yardape]

You didnt hit anything did you? Maybe check your enertia switch before you get the new relays

 

[Bo-bo]

no I didn't hit anything. I also planned on buying both, but wanted my facts straight when at the parts store. Thanks for the reply, saves me from looking like a dumba@@ infront of the parts guy, even if I had to be spoon fed here hahaha! Seriously thanks. I post back later today or tommorrow.

 

[Yardape]

Check your inertia switch just in case.

 

[Bo-bo]

The inertia switch was not sprung up, I tried to push it down and it is fully seated. I got fuel relays today and plugged them in. I still have 6.7 volts to the pump. I did notice that these relays are supposed to replace the two that I need, but they have 5 prongs each, where as mine only have 4. I looked at Jeff's but couldn't find them on his site.