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Yes, along with many other causes a bad fuel pump relay can cause a no start. The fuel pump relay provides power to the fuel pump.
No , it would crank , but if there was no power getting to the electric fuel pump it would not start
Whatever controls the relay must be broken, if everything beyond the relay works.
when you change the fues and relay switches and the truck dont start what to do next.
Could be bad glow plugs.
No a bad muffler shouldn't, but a clogged catalytic converter will.
my air bag light is on, when I start the truck it flashs 6 times then 4 times?
no such relay.
There are a couple of a reasons why a 1994 Ford F150 truck will not start. The truck may have a dead battery or the spark plugs need to be replaced.
If all of the other remote functions work, the problem is most likely in the truck. Check all of the connections and the relay that control the remote starter functions of the truck.
You may have gotten a bad relay, or there may be a loose electrical connection at or close to the relay.
The starter or battery could be weak. The weakness will cause the starter to turn too slowly to start the truck.