Flash to Pass

[budro]

Back in a ranger and back to the best website for ranger tech. I have a 2005 Ranger 4 door extended cab 4.0 FX4 with 67k on the clock . Troubleshooting a flash to pass issue. Flash to pass works fine with the lights off as in sitting in front of the garage door, I pull back the turn signal lever and brights light up the door. As soon as I turn the headlights on the flash to pass no longer functions. Anyone have any idea? The only thing I can think of is either the multifunction (blinker) switch or the light switch. If it was a bad switch why does it work with the lights off though? Doesn't matter if the truck is running or not. Same results.

 

[pjtoledo]

check the owners manual.
the low current board may have something to do with it.
from a 2005 factory book:

 

[budro]

check the owners manual.
the low current board may have something to do with it.
from a 2005 factory book:


View attachment 148527

Looking at that diagram, the flash to pass just passes through that module through a fuse. It branches off for DRL but I do not have those or they are disabled. Plus with the lights off it passes through fine so I know the fuses are fine.

 

[Curious Hound]

I agree. I don't see a way for the drl or low circuit board to cause your issue. Something is wrong in the multifunction switch.