hi when i turn my key a whining usually comes on and now it doesn't and it wont start. all it makes is a click and that's it. everything else works fine.Thanks

 

it may be helpful to know what type of vehicle you are working on.

make, model, year, ect.

if we assume you are working on a 1997 F350, then a whining sound may indicate the fuel pump. it should kick on for a second when you turn the key on. if it is not doing that, then you have something wrong in the fuel system. be it a failed fuel pump, or fuel pump relay being the most common (in my experience).

sometimes you can get enough pressure out of a failing (failed) fuel pump to start the vehicle if you cycle the key on/off about 10 times in a row then immediately try to start the vehicle. sometimes it will run for a few seconds that way.

alternatively, have some one bang on the bottom of the fuel tank while you cycle the key then try to start. sometimes they will run for a few seconds after doing this as well.

both of these would indicate, to me, a failed fuel pump.... assuming you have a fuel injected truck.

 

Ok. I took it into a repair shop to get it looked at. Thanks