Truck will not start after replacing turn signal switch
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1st Gear
Joined: Mar 2025
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Truck will not start after replacing turn signal switch
I recently bought a 1993 f250 xlt with a 460 engine and have been doing some work on it.
I just replaced the turn signal switch because the turn signals and wipers barely worked and I traced the problem to the switch. After installing the new switch I went to start the truck and all it will do is crank. I can hear the fuel pump working and the engine is cranking just not starting, and it ran perfectly fine before replacing that switch.
Im still pretty new to ford trucks and Im very confused. Any suggestions?
I just replaced the turn signal switch because the turn signals and wipers barely worked and I traced the problem to the switch. After installing the new switch I went to start the truck and all it will do is crank. I can hear the fuel pump working and the engine is cranking just not starting, and it ran perfectly fine before replacing that switch.
Im still pretty new to ford trucks and Im very confused. Any suggestions?
Logistics Pro
Joined: Nov 2013
Posts: 3,921
Likes: 1,191
From: Mojave, Ca
The switch can't prevent your engine from starting. There's no wires that go from the switch to the ECU or engine component.
It's more likely that you bumped or damaged your near-by ignition switch, which will definitely affect your engine.
Check for spark while you're cranking your engine, and go from there.
It's more likely that you bumped or damaged your near-by ignition switch, which will definitely affect your engine.
Check for spark while you're cranking your engine, and go from there.
Hotshot
Joined: Jul 2020
Posts: 10,268
Likes: 2,563
From: Near Salt Lake City
+1 for that
Those ignition switches also can come apart and even start the truck on fire
The testing...
They call it interrogation
You interrogate that ignition switch by moving the wire connector around while you cycle the key back and forth
Act like a 2 or 3 year old kid and go after it with the key and wiring
Those ignition switches also can come apart and even start the truck on fire
The testing...
They call it interrogation
You interrogate that ignition switch by moving the wire connector around while you cycle the key back and forth
Act like a 2 or 3 year old kid and go after it with the key and wiring
FTE Chapter Leader
Joined: May 2006
Posts: 12,317
Likes: 1,298
From: Central Mississippi
When you turn the key to on & not start, does the pump run 1-2 seconds & stop or continue to run?
Have you checked to see if there is spark when it cranks-no start?
Do you know where the SPOUT plug is below the diagnostic connector under the hood?
Is the switch you replaced at the base of the steering column? (edit, sorry, another thread)
Have you checked to see if there is spark when it cranks-no start?
Do you know where the SPOUT plug is below the diagnostic connector under the hood?
Is the switch you replaced at the base of the steering column? (edit, sorry, another thread)
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