1985 F150 Does it have a heater blower relay? Where located.

under hood next to fuses

It is located in the blower/flasher relay block mounted behind the center of the dashboard above the transmission hump behind the radio/climate control area.

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It is located in the blower/flasher relay block mounted behind the center of the dashboard above the transmission hump behind the radio/climate control area.

Could be the block resisitor, could also be the main switch on the dash, or the relay switch. In order to pinpoint the culprit, best to test them.

The blower motor resistor could be the problem. It is located on most cars near the blower motor or on the motor itself. But yes check the fuse or relay first.

try the blower motor resistor thats a common problem, hope this helps.

The problem is the Blower Motor Resistor Pack is defective. Purchase the Pack so you will know what you are looking for. It can be located in a few locations. It can be behind the glove box, behind the kick panel on the passenger side, or next to the blower motor. I am almost certain yours is located behind the glove box but not 100% sure. Hope this helps you.

Plan on finding a melted blower motor resistor. Usually when the blower goes single speed, the blower motor resistor is the cause.

You can find it on the passenger side, looking up behind the dash / Glove box area.
In this picture the passenger side kick panel ( where the inertia fuel switch is at ) is on the right hand side of the picture.


This is what it might look like when you get it out :

The blower motor only has the 1 fuse and blower motor relay on it. If it works on high, those are OK..

Parts should be less than 75.00 total from a dealer, and it is a metric socket and lay on your back on the passenger side floor repair, real easy and quick.

Its under the hood drivers side on the upper firewall.

the heater blower does not have a specific relay. You need to replace the resistor located near the blower under the dash. It has a plug and a couple of screws.it may be a little difficult to get to .