Yesterday my trucks check engine light came on
Says#5 ignition coil,but my air conditioning quit at same time,can the two be related

 

Nope, they are not related. Change the coil out with Motorcraft, Denso, or Delphi available at rockauto cheaper than locally if you can wait.

 

Also looking at#5 coil,and hope I can get out with out removing bracket that holds brake resovoir.
One guy posted his account went put when #5 coil went out,but when he replaced coil,it started again

 

Read on another forum were guys#5 coil quit,so did his air.
Returned when he installed new #5 coil.said if computer shows big missfire it will shut compressor down
Only time I read that

 

#5 is the front plug on the driver's side.

 

Thanks

 

Actually, they ARE related. The PCM automatically disables the A/C when certain other fault conditions, like a severe misfire, occurs. The factory service manual for this vehicle contains the following advisory in the diagnostic procedure for the climate control:P035x DTCs are often caused by a connector or wiring concern or a PCM problem rather than a faulty coil. This is one of those few times when it would be useful to ohm out the coil first to see if it's open before buying or replacing anything on a hunch. It would behoove one to actually do some troubleshooting before getting a tool or a credit card out so as to not waste your time or money.

 

You are correct,I did replace coil,and it did not change.plugs we're changed 17000 miles ago,I'm waiting,as truck is at a local shop to figure out.i didn't want to mess with the plug,or testing .
Usually cost me more,once I break something.
I might have bought a coil I didn't need

 

you were correct,it turned out to be the wire goil to coil was bad.Probably from rubbing against brake resovoir bracket over time.I did not see any damage,but traced down by mechanic.Was told the part was $90 from ford.they only replaced the wire,connector to #5 coil