I have two problems with my truck. The first is that the signal lights won't work . By that I mean I need to hold the stalk in order for them to blink. If I try it the regular way the you can hear it blinking fast but no light shows on the dash. On old Mustangs there used to be a switch around the steering column that connected to the stalk do these vehicles have them? If so what do they cost to replace? Any suggestions?
Problem #2 is that the blower fan only works at the high speed setting. Is the blower motor shot or is there something else to be check and/or replaced?
Any idea what that would cost?
Thanks for the help!

 

You will need to get a new MFS (Multifunction Switch) and I believe they are around 60 bucks, I can't help you with your other problem.

 

Blower motor resistor is your most likely culprit. Located on the fire wall or on the heater box.

 

Thanks for the quick responses! I'll get them checked out.

 

While the MFS ( multi function switch ) does sound like it has a problem, you might want to try testing it prior to replacing it. Also, it could be a worn / corroded pin on the connector to the MFS causing the problem, that replacing it won't fix.

Here is the test procedure for the MFS.


This is a thread showing what the MFS looks like once removed from the steering wheel column.
https://www.f150online.com/forums/sh...hlight=anatomy

For the Blower motor, if you have a Manual system this would be a case of 2 of the blower motor resistors are shot ( not uncommon ). If it is an EATC, then it is a speed controller ( more steps in the EATC vs. the manual ).

Here is a thread on the topic of the blower motor resistor change out, if it is a manual system :
https://www.f150online.com/forums/sh...light=resistor

Let us know if the HVAC system is a manual ( XL to XLT trim ) or EATC ( Lariat ). This info should either be in the first post of the thread, or please complete your profile with the information.