I have a 97 f150 I just bought was wrecked n front. When I turn the key on I hear a buzzing from the fuel pump relay bought new one does same thing. The kicker is one time yesterday it quit buzzing and fired right up. Now it's buzzing and won't start. It cranks fine. I checked inertia switch and the button wasn't popped. But I did unplug it and tried starting it and it did fire for a split second then died. Any suggestions thanks. U can call or text me with wat u think it is 314 368-77three7. Thanks

 

Also if I hit the brake or turn lights on the buzzing stops but does not fire

 

Sounds like a bad ground, probably for the PCM. Check the grounds on the front radiator support first.

 

Have any idea where there they r. Right now it has no shroud or headlight panel on it

 

Found the grounds they're both good. The guy I got it from did have the bed off is there anything there I need to check

 

Do not just rely on a visual check of the grounds. Do a volt drop test to check the entire ground circuit at once as the problem could be elsewhere in the wire. Do this with someone cranking the engine as current must be flowing for this test to work. 0 volts is best, up to .5v is acceptable.

 

Where was the truck hit and what was smashed?

 

Front middle damaged coresupport hood grill radiator