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Peter Bagley
Peter Bagley, Toyota mastertech
Category: Ford
Satisfied Customers: 310
Experience:  master tech at Toyota dealer
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I have a 1987 ford f150 inline 6. I have no power to the

Customer Question

I have a 1987 ford f150 inline 6. I have no power to the fuel relay. When I put a 12v power source to the fuel pump it runs like a champ.
JA: Is the power loss consistent, or does it fluctuate?
Customer: power loss is consistent
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I replaced the thermal plug with a new one, because the old one was crowded. I put a new fuel relay in.
JA: Anything else you think the mechanic should know?
Customer: For some reason when I press down the inertia switch to reset it. The button does not click to engage.
Submitted: 4 months ago.
Category: Ford
Expert:  Joshua Haynes replied 4 months ago.

Hi, my name is ***** ***** I will asist you

Expert:  Joshua Haynes replied 4 months ago.

Have you tried holding the inertia switch in and then testing for power at the relay or trying to start it while holding the inertia switch in the engaged position manually?

Expert:  Joshua Haynes replied 4 months ago.

Hi, please let me know if you still need help with this problem

Expert:  Joshua Haynes replied 4 months ago.

Another test to run, by the way, is to manually short the inertia switch by putting a paper clip between the two female pins on the connector. I hope this helps!

Expert:  Joshua Haynes replied 4 months ago.

Hi, I am checking in to see if you still need help with this problem.

Expert:  Joshua Haynes replied 4 months ago.

This is Josh checking in to see if you still need help.

Expert:  Peter Bagley replied 4 months ago.

hi my name is ***** ***** would like to be of help to you. I see you done most of the preliminary checks and replaced parts. the pump obviously works as you jumped to it and you replaced the relay right. well did you check the 20 amp fuse that feeds the relay? a relay is just a higher voltage switch but has to be activated from a lower voltage source.find the fuse and check it on both sides. if defective replace it.have someone sit in vehicle and turn on and off while you put your finger on the relay to hear and feel for a clicking. If you have the manual it should show you the fuse location.

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