Unplug daytime running light module. It is located on driver side just under the front of the truck.
If the check engine light is flashing with the engine running , that means a spark plug misfire has been detected
The ignition control module for a 1995 ford f150 is an important part of the drive train. If the module is failing then the engine will run erratically or not start at all.
The connector for changing the tailght bulb is only accessable when the tail light module is removed from the truck. Take the screws holding the light onto the truck out, and the module can be pulled out to where the lamp can be changed. Drop the tailgate to access the two screws
Powertrain Control Module ( PCM )
The airbag module for the 1997 Ford F150 is located in the passenger side kick panel below the dash. It is silver and black in coloring.
disconnect the battery for a few minutes, reconnect and start it. if there is no problem, the light will stay off
under the dash, above the radio. take out speedometer module to get to it
1986 f150 emisson light on is their restn set
under the dist. cap
Not sure what a HEC is. More info please.
Could be the ignition module. It's attached to the side of the distributor.