91muddog

Well the blower for the heater in my truck(non ac) is very slow, it appears to be on low through all speeds, i can see the actuall motor too since i dont have a glove box.

what should i check first?

91muddog

no info on this anyone?

WHAHAHAJR

Slow blower motor or no air volume? Does it sound like it making alot of noise but no air flow?

91muddog

its not making alot of noise, the motor pretty much just stays on low speed. i dont have a glovebox so i can see the motor

BMcEL

http://www.4crawler.com/4x4/CheapTricks/Blower.shtml

tj884Rdlx

typically for any vehicle, a blower fan with only one speed = failed resistor pack. i don't know if your year truck has one. otherwise, fan switch.

91muddog

thanks bmcel for the link!

saving that for sure

misaaccooper

The fan gets direct power from the under hood fuse panel. 10G White wire. The switch in your dash is three different size grounds. I don't really know, there is a relay also. I bypassed everything and had a toggle switch for off/high.

The 'off' position is open.
The 'high' position is high.
The lower speeds have resistors or something to reduce voltage=fan speed.

All the cars i've messed with are wired this way.

I can take a picture of my rig job since i run no dash

Keith B.

Remove the blower, hook it up to straight 12V from the battery. If it blows fast at 12V, it's probably the motor has just gone slow(bad/worn out bushings/bearings, etc); Usually when the resistor goes bad, you lose all speeds except high.