No "high" setting on Blower Fan

[9GUY9]

My ex is having the opposite problem of the bad blower fan resistor. It has speeds 1-3 but don't work on high. I Tried a different switch, with no luck, and just for fun I pulled my resisor and checked for continuity of the terminals and it was good.

Anyone have any idea where the fan pulls power from on the high setting, or a wiring diagram showing the blower circut? Thanks

 

[KPT]

The blower positive side never changes. The resistor is on the negative side. I would connect the negative side of the blower directly to ground. If it doesn't work then it is likely a bad motor.

 

[budwich]

its not a resistor... there is no resistor in the circuit in high... its the high speed motor relay.

 

[9GUY9]

its not a resistor... there is no resistor in the circuit in high... its the high speed motor relay.

is this resistor located in the underhood fuse box? I looked at the diagram and all it showed for relays was the max AC.

 

[gijoecam]

Ditto... the high speed relay is sticking. Without knowing what year, make, and model you have, we can't really be much help on location.

 

[9GUY9]

Ditto... the high speed relay is sticking. Without knowing what year, make, and model you have, we can't really be much help on location.

Sorry, I guess it would be good to know what I'm asking questions about

Its a 97 4WD Sport. I fount the small block of relays mounted next to the airbox last night. Is it one of these?

 

[9GUY9]

Thanks for the help guys.

Got it working today. It was the relay located behind the right headlight next to the airbox.

 

[BrooklynBay]

Thanks for the update!